A few snippets from the AP story with eyewitness account:
It wasn't immediately clear what happened to the plane as it was landing, but some eyewitnesses said the aircraft seemed to lose control and that the tail may have hit the ground.
Kate Belding was out jogging just before 11:30 a.m. on a path across the water from the airport when she noticed the plane approaching the runway in a way that "just didn't look like it was coming in quite right."
"Then all of a sudden I saw what looked like a cloud of dirt puffing up and then there was a big bang and it kind of looked like the plane maybe bounced (as it neared the ground)," she said. "I couldn't really tell what happened, but you saw the wings going up and (in) a weird angle."
"Not like it was cartwheeling," she said, but rather as though the wings were almost swaying from side to side.
Boeing said it was preparing to provide technical assistance to the NTSB. The maker of the plane's engines, Pratt & Whitney, said it was cooperating with authorities investigating the crash.
The most notable accident involving a 777 occurred on Jan. 17, 2008 at Heathrow Airport in London. British Airways Flight 28 landed hard about 1,000 feet short of the runway and slid onto the start of the runway. The impact broke the 777-200's landing gear. There were 47 injuries, but no fatalities.
An investigation revealed ice pellets that had formed in the fuel were clogging the fuel-oil heat exchanger, blocking fuel from reaching the plane's engines. The Rolls-Royce Trent 800 series engines that were used on the plane were then redesigned.