The group is called 'Forte' which Hana Ryu explained he moved to America 4 years ago and had NEVER spoken English before. Click and watch the link below for his explanation and performance.
Josh Page, Hana Ryu and Fernando Varela of Forte met on the internet just a few weeks before their America's Got Talent audition, they met face-to-face the day
News got out that the reason he wasn't at Forte's 2nd performance was because he had to drop out(quit?) because of visa problems(America's fault?). See the the new guy Sean Panikkar singing with 'Forte,' see video below, http://www.fwweekly.com/2013/07/19/fort-worth-opera-star-on-americas-got-talent/
Hana Ryu wrote a very gracious statement on his Facebook page, explaining that he is having Visa (immigration) complications which need to be resolved. Personally, I was very disappointed not to see him, but I'm sure he will do very well in his musical career, as will FORTE.
Forte Opera Singers Lose a Member But Turn it into a Blessing. ... Looking forward to cheering for you all this season on AGT. ... Hana Ryu wrote a very gracious statement on his Facebook page, explaining that he is having Visa (immigration) ... And the plot thickens as Hana of Korea had to drop out of the competition!https://www.facebook.com/ForteTenors?filter=2