a u.s. soldier has received the purple heart from u.s. president donald trump. sergeant first class alvaro lost part of his leg after being wounded in afghanistan. he attended the ceremony in a wheelchair accompanied by his wife. the purple heart is awarded to service members wounded or killed in combat. this was the president's first trip to the water reed military medical center near washington. president trump is about to reach a very important benchmark. it is 100 days in office. that benchmark happens next saturday. >> mr. trump tweeted that he will hold a big rally that day in pennsylvania. he previously tweeted that 100 days is a ridiculous standard by which to measure his presidency. the rally will be on the same day as the white house correspondents' dinner, which mr. trump has declined to attend. there are some other key events happening in washington this