The space shuttle Discovery landed at Dulles International Airport outside Washington on Tuesday after a series of nostalgic fly-bys on the back of a NASA Boeing 747, bringing whoops of pride and tears to the eyes of space fans and astronauts alike.
The flight took the shuttle from Florida's Kennedy Space Center to the Washington area, where it will spend retirement as a museum piece at the Smithsonian Institution's air and space facility in Chantilly, Virginia, near Dulles.
"It's a very emotional experience and I'm sorry this nation is out of the space exploration business for a while," Discovery veteran astronaut Joseph Allen said.
Crowds of space fans watched the shuttle fly past from the space center, the National Mall and the Pentagon, where a crowd of service members, from privates to admirals and generals, poured outside to watch the aircraft pass by, CNN's Barbara Starr reported.
People snapped pictures, while drivers on nearby roads slowed to watch the spectacle and honk their horns in salute.
The shuttle took to the sky for its final flight mounted on top of a specially modified Boeing 747.
As it left Florida at first light, it saluted the past and all those who were part of the United States' shuttle program, flying over launchpad 39A, down the beach and over the space center's visitor complex before heading north.
Over Washington, it circled the National Mall three times, prompting repeated cheers from onlookers, before heading to Dulles
Crowds turned out at Dulles to see the shuttle, including some families who had camped in the parking lot for a couple of hours, according to CNN's Lizzie O'Leary. As the shuttle came into view, flying low, cheers erupted.
The spacecraft is the oldest of the three remaining orbiters and clocked more than 148 million miles on its missions.
Its last commander, Steve Lindsey, and five others who flew on mission 133 in February, 2011, came out to say goodbye.
"Bittersweet is an overused word, but it is sad," Lindsey said.
With every step toward retirement, the shuttle fleet becomes more a part of history. In 30 years of flying, there were grand accomplishments and heart-wrenching tragedies. A space flying machine with wings, it was like nothing ever built.
But dwelling in that past would be a mistake, Lindsey said.
"We've got to move on; we've got to make sure that spaceflight doesn't die in this nation," he said. "We still have (the) space station going, but if we don't get ourselves heavy lift, get going with exploration or part of what I'm working on - the commercial program - then we risk losing this as a nation, and I don't want to do that."
In some ways, the past is meeting the future. Just a few miles to the south at Cape Canaveral, Space X is in its final preparations to launch its Dragon spacecraft. It is a hugely crucial test scheduled for the end of April. Space X hopes to be the first commercial company to rendezvous and then berth with the International Space Station.