president calling in the nypd to arrest more than 100 pro-palestinian protesters a day after she testified before congress about anti-semitism on campus. the widespread 911 outage in four states. millions unable to call for emergency help. the cause now being traced to a single light pole. the 18-year-old arrested in maryland threatening to shoot up schools. the chilling 129-page document and more that led a friend to call police. the close call at reagan national airport. two planes nearly colliding on the runway. you ll hear the frantic call from the tower. 15 members of rfk jr. s family sending him a sharp rebuke, blasting his presidential bid and endorsing president biden. and the southern rock legend and the co-founder of the allman brothers band. remembering the iconic dickey betts. announcer: this is nbc nightly news with lester holt. good evening and welcome. the trump hush money trial appears to be speeding towards opening statements tonight, more qui
trial. they said we have our jury after seating the 12 people that will decide the former president s fate, including an investment banker, a retired private wealth manager and speech therapist and the two jurors that were dismissed, a nurse and i.t. worker. why they were excused. our team at the courthouse. also tonight, columbia university s president calling in the nypd to arrest more than 100 pro-palestinian protesters a day after she testified before congress about anti-semitism on campus. the widespread 911 out age in four states. people unable to call for help. it was traced to a single light pole. the 18-year-old arrested in maryland threatening to shoot up schools. the 129-page document and more that led a friend to call police. the close call at reagan national airport. two planes nearly colliding on the runway. you ll hear the frantic call from the tower. 15 members of rfk jr. s family sending him a sharp rebuke, blasting his presidential bid and endorsing
Severe thunderstorms and changing climate break up the pollen into smaller pieces that go deep into the body. while the large pollen grains are stopped by the upper respiratory system, the tinier ones can get into your lungs. they can trigger more respiratory distress. this is common ragweed. reporter: on the pollen grains, columbia s professor sees more proteins, a troubled sign for allergy sufferers. if there is more of that foreign substance, you ll feel a stronger response. reporter: proteins making the pollen more potent, multiplied by the carbon dioxide fueling climate change. the carbon dioxide is changing the chemistry of the pollen? yes. exactly. reporter: to keep the pollen outside, take off your shoes before going in. washing your hands and face and wiping down your phone, glasses and sunglasses. david uses a tray of medicines to cope as his mom worries his allergies will get worse. scares me because i see how much he suffers from it every year.
Of these people? whenever we experience stress, our nerves as well as hormones send signals to our glands to reless adrenaline. this can increase our heart rate, blood pressure. and this is normal when we want to fight or flight. but the problem is when this is done repeatedly, it can affect us on a molecular level and now we see with allergy sufferers. what should allergy sufferers do because we re using all these medications, which isn t a good thing half people walking around dazed, nose running. don t know if it s a cold or allergy to begin with. what s the key? 50 million people suffer from allergies. so this affects a lot of people and stress affects everybody. one of the things you want to stay away from pollen. wear a wide-brim hat, sunglasses so not only do you look like a movie star but you can keep it off your hair as well as your eyes. and then you want to keep pollen outside of your home. when you get home, take a shower, take off clothes. keep your windows closed at
So these folks who don t prepare are going to really have a lot of issues. jenna: how do you prepare? probably one of the most important things to remember is you should start your medications early before the symptoms really take effect. the other thing is you have to remember, as much as you want to open the windows and let in the fresh air and all the warm sunshine, you need to keep your windows closed to leave the pollen outside. use air conditioning, air purifiers, you need to shower every night once you come in from outside and that s also important with changing your clothes and having your pets outside. when they come in, you need to sort of decontaminate them. jenna: is it harsh to take a decongestant before you have the symptoms? chat with your doctor if you re on medications and other health issues. generally speaking if folks want to take an antihistamine, provided they have no other health issues, this shouldn t be a problem. but you should have a chat. jenna: the cent