uh, you know, i met kent evans here. i meet paul allen here. >> had kent not died?think you would have gone into business with him? >> yeah. almost certainly. i mean, it's very hard to predict, but that's our childhood. brainstorming was we were going to go and do something together. >> would there have been a microsoft? >> well, it's hard when you change things. no. you know, you could end up going down a different path. >> gates stepped down as ceo of microsoft in 2000 and announced he'd focus on the foundation he'd started with his then wife, melinda. it's now known as the gates foundation. after his divorce in 2021. >> the idea. >> of inexpensive. tools to protect you from getting hiv. >> gates says the foundation has given more than $100 billion to solve problems related to global health, education and climate change. hiv and polio were what he chose to highlight in a conversation with president donald trump when they met shortly before his inauguration. what was your your time at mar-a-lago like? >> president trump couldn't have been nicer. he asked questions.