at sea level. no diver could pith stand it. even a los angeles class navy sub has a maximum depth of 2 to 3,000 feet. tim taylor has led dozens of sub missions looking for world war ii wrecks. rockets explode, submersibles implode. they crush down on themselves like a toothpaste tube. reporter: but with time ticking away u.s. coast guard and canadian ships and planes are coordinating a grid search looking for any signs the sub has come to the surface. so far nothing. if the sub is intact under water it may have only a day and a half of air left. this is a very complex search and a unified team is working around the clock to bring all available assets to bear as quickly as possible. reporter: the sub called titan has never been certified. among the safety concerns the hatch can only be unbolted and opened from the outside, not the inside. and it runs using a video game controller. the navy is now rushing salvage equipment to the site in case the sub needs to be lifted out of
was kept in office to avoid conflicts of interest. and attorney general merrick garland has said he is not interfere in the case. still a career irs agent has asked for whistle-blower protection alleging hunter biden received special treatment in the investigation. these deviations from a normal process, and each and every time it seemed to always benefit the subject. reporter: the investigation first focused on hunter biden s foreign business dealings. he s been blasted by republicans including for his high paying job on the board of a ukrainian energy company while vice president biden was in charge of ukraine policy. hunter was pressed in 2019 whether that company would have asked him to be on its board if his last name was not biden. i don t know, probably not. i don t think that there s a lot of things that would have happened in my life if my last name wasn t biden. reporter: and tonight house republicans are vowing today s plea deal will not impact their ongoing investig
financial affairs, and these tax charges are what prosecutors decided to bring. but there may still be related matters under investigation. meanwhile, hunter biden will soon report to this courthouse to find out whether a federal judge will go along with the terms of the plea deal including no prison time. lester? all right, ken dilanian tonight, thanks. there s also news in the federal case against donald trump over his handling of classified documents. the judge setting a trial date as the former president lays out his defense. here s garret haake. reporter: the federal criminal trial of former president trump over his handling of classified documents has tonight been set for august 14th. judge aileen cannon scheduling two weeks for the case, and now the republican presidential front-runner previewing his defense on fox news. i have every right to have those boxes. this is purely a presidential records act. this is not a criminal thing. reporter: mr. trump was pressed since
investigation into whether or not joe biden is compromised because of the millions of dollars his family has received from foreign nationals. reporter: president biden repeatedly defended his son. first of all, my son has done nothing wrong. reporter: tonight this reaction after hunter biden s agreement to plead guilty. i m very proud of my son. so, peter, how might this have an impact on the 2024 campaign? reporter: lester, it removes the possibility of a trial, which would have been a huge headache for president biden in the middle of the campaign. still, for republicans as you heard, it keeps alive their allegation of a two-tiered justice system. and we re already seeing top republican candidates fund-raising off today s news. lester? peter alishder at the white house, thanks. let me bring in our justice correspondent ken dilanian. ken, hunter biden s lawyers say the investigation is now over, but the u.s. attorney says it s ongoing, so where does this case actually st
the ocean. if your submersibles can find this sub, is there any way to retrieve it and save the people onboard? we have a group of our nation s best experts on the unified command, and if we get to that point, those experts will be looking at what the next course of action is. reporter: but time is of the essence. kerry burts is a former astronaut and close friend of hamish harding who heard from him before he dived. the hope all five are still alive. i would assume they re stuck in the bottom in the mud or somehow entangled in the tay tannic. it s a search and rescue mission so first of all they have to find them. tom, what more can you tell us about this salvage equipment the navy is rushing to new finland, canada? reporter: the air force tells us c-17said are right now flying that salvage equipment from buffalo to new finland, but then they ve got to load it onto a ship or ships.