what he said about reports the u.s. spied on south korean officials, rising nuclear tensions and relations with china the slow-moving disaster the severe flooding threat as snow melts much of yosemite park closed, as some areas along the mississippi are already under water. what doctors are calling one of the worst allergy seasons in decades why so many adults are suffering for the first time. and the remarkable life of an american original, singer, actor and civil rights activist, remembering the great harry belafonte. announcer: this is nbc nightly news with lester holt good evening and welcome, everyone. there are 560 days until the 2024 presidential election, and tonight the ingredients for a potential trump-biden rematch are falling into place following president biden s announcement today that he is in, officially running for a second term in office as he put it in an early morning video release, to finish the job. the president laying out the stakes, taking
seasonal allergies are making more people absolutely miserable this year, and they re hitting a lot of adults for the very first time catie beck tells us what s behind the increase and how you can reduce your risk. reporter: new york schoolteacher kiera wilson spent her recent spring break feeling miserable. itchy throat. so much sneezing i actually had to buy allergy medicine for the first time. reporter: for the first time as an adult, wilson is struggling through allergy season this year is much, much, much worse. reporter: allergist dr. stanley fineman says he is hearing similar patient stories from first-time allergy fighters in their 30s and 40s. i saw one just now, in fact this morning, who was miserable. reporter: doctors say onset seasonal allergies are becoming more common because warmer temps are extending the window for pollen release this is kind of a pollen storm almost,