the icus. premature babies taken out of incubators and placed together for warmth. israel accusing hamas of using hospitals for cover. video allegedly showing hamas terrorists with a grenade launcher at the entrance of another hospital. also, the 3-year-old american child being held hostage by hamas. what we're learning. and after another round of u.s. airstrikes in syria the new attacks on american forces in the middle east. also tonight, a secret service agent guarding president biden's granddaughter opening fire. the search for suspects. the supreme court adopting its first code of conduct. the new rules for justices amid mounting ethics questions. the race to avoid a government shutdown this week. the first major test for the new speaker mike johnson. can he get the votes? the traffic nightmare in los angeles after a massive inferno. how long will one of the nation's busiest freeways be shut down? and restoring their honor. over a century later justice at last for more than 100 black u.s. soldiers. >> announcer: this is nbc "nightly news" with lester holt. good evening and welcome. israel's determination to destroy hamas for the october 7th terror attack is coming at a high cost and causing unease at the white house. with gaza's main hospital without power and no longer able to function, president biden expressing the hope and expectation that there will be less intrusive action relative to the hospital. the hospital, he said, must be protected. images like these of newborn babies in distress have become icons of the widespread suffering in hamas-controlled gaza where an estimated 1.6 million people had been displaced since the war began. israel tonight showing what it says is evidence of hamas activities below hospitals. proof, it says, that hamas is using civilians as human shields. keir simmons is in the war zone for us tonight with the latest. >> reporter: tonight after days of fighting around hospitals in northern gaza and critical medical resources in short supply, bodies piled outside and deepening desperation inside, here a palestinian doctor treating a patient with a cell phone light, president biden calling for less intrusive action near hospitals. >> we're in contact with the israelis. the hospital must be protected. >> reporter: israel says hamas is using hospitals for cover. they say this is a hamas fighter with a rocket-propelled grenade at al quds hospital, a claim denied by doctors there. but this evening the israeli defense force releasing a roughly ed video shows a tunnel near rantisi hospital. >> i want to show you a room where we found all the gear, the operational gear of hamas. >> reporter: including, he says, grenades, bombs, and rpgs in the hospital's basement. then israel's military spokesman points to a chair and rope. >> this is a suspicion for area where hostages were being held. >> reporter: nbc news cannot independently verify the allegations. hundreds of thousands of palestinians have fled south but say they're still not safe. "look at the bodies," this dad cries. "women and more children killed." the european union, like president biden, improving israel to show maximum restraint while condemning hamas for it says using hospitals and civilians as human shields. and at al shifa hospital, now surrounded by fighting, dozens of premature palestinian babies are fighting for life. with no power for incubators. >> we lost oxygen last night and we are afraid not to have more oxygen. >> reporter: while somewhere in gaza are children kidnapped from israel including 3-year-old american israeli abigail mory dan. both her parents were killed by hamas. the entry trufanov family were targeted. dad one of the 1200 israelis murdered in the hamas terror attack. grandmother, mother, son and girlfriend taken. mother yelena in a hostage video there on the right. with no family left friends speaking for them tonight. >> so we're here because they will not be forgotten. we want them to know that we're here and we're waiting for them and we're their family for now until they come back. >> keir, if i can circle back to the hospital situation, can those patients we saw be evacuated? >> reporter: lester, israel says it wants that. but tonight the palestinian red crescent says an evacuation convoy for one hospital had to turn back because of shelling and gunfire. lester? >> keir simmons in tel aviv tonight. thank you. the u.s. military has carried out another round of airstrikes in syria in response to attacks against u.s. troops by iranian-backed militias. but it's apparently not slowing them down. courtney kube joins us. courtney, those militias are already striking back at u.s. forces. >> reporter: yeah, that's right, lester. the iranian-backed militia group struck u.s. bases again four more times. now, there were no casualties and there was only minor damage at one base. but it is proof that the new u.s. airstrikes have not deterred the militia groups. those u.s. strikes last night hit a safehouse and a training site used by the iranian-backed militia groups. >> and courtney, another story you're following there at the pentagon, new details on a deadly u.s. helicopter crash on friday. >> reporter: yeah, that's right. lester, five u.s. special operations soldiers known as night stalkers were killed when their helicopter crashed during a refueling training mission in the eastern mediterranean. now, they were deployed to the region after the hamas terror attacks. and to be ready for any possible evacuation or rescue of american citizens. lester? >> courtney kube, thank you. also tonight, hope for some children from gaza. cancer patients cut off from chemotherapy by the war. until the white house, palestinian cancer advocates and st. jude's hospital stepped in. andrea mitchell has our exclusive report. >> reporter: victory at last for 10-year-old jori zakut, one of 21 palestinian children with cancer. safe in an egyptian hospital, flashing a sign of victory. the children with parents or guardians at the center of a secret international mission since the war began to rescue them from gaza. their joy tempered by reality. she says, "i would lie if i said i was optimistic and my family is still in gaza. i am afraid for them and our house has been hit." tahani came to egypt with 4-year-old omar, leaving behind their family for the chance to save his life. she says, "i had the feeling of any mother who was afraid for her son. i was afraid that his treatment would stop." it's been a treacherous journey, especially after israel warned the hospital and then attacked. the evacuation initiated by cancer advocates at the palestine children's rescue fund and st. jude's hospital with help from egypt, jordan and the u.s. >> the president was closely involved in helping children get out of ukraine that were -- that needed cancer treatment. immediately upon hearing about this request the president directed us to do whatever we could to help these, you know, civilians who are in very acute situations get out of gaza. >> reporter: 2-year-old afaf and her father left her mom and siblings behind. sadness mixed with relief. >> they start to smile for the first time and they start to feel secure. it's very relieving. and we hope that we can do that for all the needed children in gaza. >> reporter: with the children's hospital in gaza now closed, 31 children remain trapped in the war zone. some approved to get out but displaced from their homes and hard to locate. lester? >> andrea mitchell, thank you. tens of thousands of people are set to descend on washington tomorrow in a show of support for israel. the department of homeland security raising the threat level around the massive event. meanwhile, tense moments last night outside the home of president biden's eldest granddaughter as a secret service agent opened fire on people breaking into a government vehicle. kelly o'donnell has that story. >> reporter: a troubling spike in crime in the nation's capital edged closer to the president's own family. the high stakes evident. >> just be advised -- >> reporter: from the police radio. >> secret service involved. >> reporter: first granddaughter 29-year-old attorney naomi biden, daughter of hunter, frequently seen at white house events. a bride here on the south lawn one year ago. last night biden was at home in the leafy and affluent georgetown section of washington when officials say just before midnight secret service agents encountered possibly three individuals breaking a window on a parked and unoccupied government vehicle. the incident led to a single gunshot. a federal agent discharged a service weapon, and it is believed no one was struck. the suspects fled in a red sedan. authorities say there was no threat to naomi biden. >> and any concern about your granddaughter's safety, sir? >> reporter: today the white house did address the broader danger. >> we are definitely concerned by what we're seeing and not just here, across the country obviously. >> reporter: washington, d.c.'s own data show a staggering surge. motor vehicle theft up 98% over last year. robberies up 68%. and murder up 32%. today mayor muriel bowser declined to comment on the first family incident. >> i would go to secret service if you have any questions. >> reporter: officials say the federal agent is on routine leave pending an investigation on the use of his firearm. while the suspects have not yet been caught. lester? >> all right, kelly, thank you. the supreme court today announced a new ethics code after a series of revelations about unreported travel and gifts for some of the justices. senior legal correspondent laura jarrett joins me now. and laura, this is a first for this court. >> it is, lester. and after months of pressure the justices for the first time now say they are bound by a formal code of conduct. a 14-page document outlining what activities to avoid, when they may need to recuse and reaffirming the existing rules around gifts. that's something that's attracted more scrutiny in recent months with reports of luxury travel. justice thomas accepted for years something he said he thought he didn't need to report at the time. but even now with this new code the big question tonight is left unanswered. how are these rules going to be enforced? what happens if a justice breaks the code? that's why some critics say the real legislative reform is still needed here, lester. >> all right, laura, thank you. and once again there is a race to avoid a potential partial government shutdown. ryan nobles is at the capitol, and ryan, the deadline is approaching quickly. >> reporter: yeah, that's right, lester. and it means that the congress is running out of time to come up with a budget deal. there are only four days before the government shuts down. right now the house speaker mike johnson has proposed a two-tiered short-term spending plan that would allow all the sides to negotiate a long-term budget package. his proposal does not call for any cuts but it also does not provide any funding for ukraine or israel. now, several republicans have already said that they will vote no on this package, which means in order to pass it will require votes from democrats. lester? >> ryan nobles at the capitol. thanks. also tonight, president biden and his chinese counterpart are set to meet for the first time in a year this week. and as janis mackey frayer reports, the economic stakes couldn't be higher. >> reporter: with youth unemployment high in china, lin xia qi is choosing the best work he can find these days. at home. the 24-year-old among a growing number of young adults getting paid by their parents to be a full-time child. a label that's trending. and for lin means doing chores like driving his mother. or helping at the family's factory until he can find a job. "i'm glad i have stability," he says. "for now it's not bad." shoring up china's economic ties is why chinese president xi jinping is paying his first visit to the u.s. in six years. china needs it. the economy slowing down and hurting. foreign investment in china turning negative for the first time with $11.8 billion flowing out. a property crisis pushing local government debt to $9 trillion. and when the youth unemployment rate hit 21.3% in june, the government stopped releasing numbers altogether. . >> at the end of the day both nations need to cooperate. we need to do the business. >> reporter: the u.s. is china's number one trading partner. to the tune of $758 billion. but there is also tension and mistrust about managing china's rivalry with the u.s. that has deepened under xi's rule. from china's close ties with vladimir putin to confrontations over tariffs, the spy balloon crisis, the south china sea, and taiwan. >> i think we've made some progress in reconnecting the two governments and establishing these leadership channels, which we didn't have frankly a year ago. >> reporter: one thing that can't be overstated is that when xi jinping arrives here in san francisco optics are of the utmost importance to show these two powerful leaders are at least talking. lester? >> janis, thank you. in 60 seconds, new charges against the convicted murderer who escaped by crabwalking up a prison wall. plus, the l.a. traffic meltdown after a massive fire. was it arson? meltdo after meltdo after wn is this for me? 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