From Good Morning America.

Tens of thousands of people packed State Farm Stadium in Arizona on Sunday to pay tribute to Charlie Kirk, who was hailed a "martyr" by President Donald Trump and other leading conservative figures.

"I know I speak for everyone here today when I say that none of us will ever forget Charlie Kirk, and neither now will history," Trump said.

Kirk, 31, was fatally shot on Sept. 10 while speaking at Utah Valley University for his The American Comeback Tour, which invited students on college campuses to debate on hot-button issues.