The Stairwell sings "Some Nights" on America's Got Talent Live Shows

Watch Air Force all-male a Capella group In The Stairwell sings ‘Some Nights’ on America’s Got Talent Live Shows Week 1 on Tuesday, August 15, 2017.

“It think you stepped it up one more time,” said Howie.

“Your harmonies were just so yummy. You all look really good. I love the awkward choreography,” said Mel B.

“You stand for freedom and brotherhood. We love man in uniform,” said Heidi.

“This to me was such a stepped up when we first saw you. You deserved to be here,” said Simon.