Annie Glenn touches the casket of her husband, John Glenn, as he lies in honor Friday. Glenn's home state and the nation began saying goodbye to the famed astronaut who died last week at the age of 95.

COLUMBUS, Ohio — The nation’s vice president and a retired Marine Corps general were among the dignitaries, family members and other mourners who choked up Saturday during a memorial tribute to the late space hero John Glenn.

Roughly 2,500 people gathered at Mershon Auditorium on the Ohio State University campus for “a celebration of life” for the former fighter pilot, history-making astronaut and longtime Democratic U.S. senator from small-town Ohio. He was remembered not only for bravery, but for his thoughtful consideration for others, his integrity and his patriotic optimism.

“I think John defined what it meant to be an American, what we were about, just by how we acted,” said Vice President Joe Biden, a former colleague of Glenn’s in the U.S. Senate. “It was always about the promise. We were a country of possibility, opportunity, always a belief in tomorrow.”

Retired USMC Gen. John Dailey said Glenn was “never in it for himself,” but always acted for the nation’s greater good. Like many others, he recalled Glenn’s humility and basic kindness.

“We had John for 95 great years and it still wasn’t enough,” Dailey said.

Glenn died Dec. 8 at age 95. He was the first American to orbit the Earth in 1962, and then in 1998 became the oldest person in space at 77.

Thousands of people, including Democratic U.S. Secretary of State John Kerry, visited the Ohio Statehouse on Friday as Glenn lay in honor.

Ethel Kennedy, widow of close Glenn ally Robert F. Kennedy, and their son Robert F. Kennedy Jr., were among the mourners present, along with Ohio political leaders including Gov. John Kasich and former Govs. Ted Strickland and Richard Celeste.

NASA Administrator Charles Bolden Jr. said the U.S. space program remains indebted to Glenn.

“It was courage, grace and humility John displayed throughout his life that lifted him above the stars,” Bolden said. “As the current head of NASA, I can say unequivocally that we are standing on John Glenn’s shoulders as we pursue a human journey to Mars, a journey that would not be possible without his bravery and selfless dedication.”