Transcript for The Invictus Games Kickoff in Orlando, Fla.
Finally tonight, celebrating wounded warriors in our country and around the world. The invictus games have begun. And those warriors now competing again. Tonight, robin Roberts with the first lady and prince harry. H Reporter: How did you approach your grandmother? Mrs. Obama came to us with a challenge. I didn't know what to do. She dragged her husband into it, the president -- Dragged him into it. From Michelle. Hey, prince harry. Remember when you told us to bring it at the invictus games? Careful what you wish for. Boom. Oh, really? I didn't want to have to ask the queen, because I didn't want, you know, back her into a corner. But when I showed her the video, I told her, she's like, what do we need to do? Let's do this. Boom. United States of America. Reporter: It is game on and the invictus games kicked off last night on espn2. We are invictus. Reporter: Prince harry, joined by the first lady, welcoming some of the nearly 500 wounded warriors from 14 different nations. And robin asked them -- Reporter: What is it about sports that seems to be the great unifier? A lot of these guys, once they were forced to leave the military, they didn't have any recognition as part of being part of a team again, to be able to wear your national flag again on your left chest is such a massive thing for these guys. And they're some of the best competitors that you'll find. Our thanks to robin and the first lady and the prince. The invictus games continue tonight on espn2. Thank you for watching here on a Monday night. I'm David Muir. I hope to see you right back here tomorrow. Until then, have a good evening.
This transcript has been automatically generated and may not be 100% accurate.