The plane left Moffett Field in Mountain View near San Francisco just after dawn Friday.
He recalled the passengers on United Flight 93, who were said to have crashed their plane into a Pennsylvania field to divert it from Washington.
In Shanksville, Pennsylvania, where mourners gathered to remember the passengers and crew of United Airlines Flight 93, Deena Burnett remembered her husband, Tom -- one of the passengers thought to have fought with the hijackers before the plane crashed in a field.
Italy has prepared a military transport plane which will be used to take in a field hospital and emergency medical team.
Considered the world's most advanced sun-powered plane, the Solar Impulse took off from Moffett Field in Mountain View at first light for a two-hour practice run in advance of a planned multi-city, cross-country tour.
From New York, the Obamas travelled to the field on Shanksville, Pennsylvania, where the fourth plane was forced down by passengers who fought back.
BBC: 9/11 anniversary: Sombre US honours victims 10 years on
At Franklin Field later in the 1960s, instead of peddling sausage the plane flying overhead towed a banner reading "Joe Must Go" for the ill-starred Joe Kuharich.
WSJ: Chip Kelly: Torn Between Two Birds��Oregon Ducks, Philadelphia Eagles
Some analysts were sent into the field to track a specific individual, following a trail of phone calls, plane tickets and informational crumbs about wives, habits and the like until a picture of the target emerged.
WSJ: Manhunt on HBO; The Big C; Hereafter on Showtime: Television Reviews by Nancy deWolf Smith
Vey, who competes in track and field and shooting, had a leg amputated after an injury she suffered when a cargo plane had to take sudden evasive action.
The plane flew more than halfway across the United States, apparently on autopilot, until it crashed in a South Dakota field.
应用推荐