[Music] veteran TV judge Simon Cowell usually always has something to say when judging reality competitions such as American Idol The X Factor or America's Got Talent but that wasn't the case on Wednesday's AGT semi-finals after drone act Sky elements finished an udor performance dedicated to member Preston Ward's late infant daughter Briley Rose cowl was left speechless that was uh that was um oh gosh cow said as he searched for words and gave up Sky elements was the act that prompted him to break the show's rules in the auditions round and Grant each judge an additional Golden Buzzer to protect their favorite acts from the other end of the judge's table Howe Mandel noted that the loving tribute which featured a giant Rose and butterflies was a fitting one to air on September 11th when so many people lost loved ones I can't thank you enough for this Mandel told Sky elements and I'm looking at your family members there isn't an act that just moves your heart this much and you just broke us the other two judges Sophia Vergara and Heidi clom were just as affected I mean who knew that drones could make you so emotional Vergara asked that was a surprise that was so beautiful that was like heartfelt and I mean I don't even know what to say congratulations what a beautiful beautiful job meanwhile Clum said I just want to give you a big hug right now earlier in the show Kelsey Jane the aerialist who happens to be a dentist in her off-stage life told cowl that even if she wins the show's $1 million prize she plans to keep practicing School Janitor and singer Richard got all wow with his rendition of survivors Rocky song I of the tiger and roone sige in her dog Rhythm delighted with their dancing quit change artist Salange cardinally magician young men and young singers Alex Samson ashes and arrows Prisa Mishra and Reed Wilson were at the top of their game comedian learn more janosi and dance group Brent Street made their cases too the night featured 12 impressive acts and all vying for six spots in the final round of performances the six acts that receive the most votes from the public will be revealed on the September 12th results episode from there those six as well as the four acts who received the live show golden buzzer will form the group of 10 finalists they will perform one more time on Tuesday September 17th and one will be named the winner on the September 24th finale but first results of the semi-finals will be revealed on the America's Got Talent live results show on Thursday September 12th at 8:00 pm. on NBC