Two flight attendants who were in the back of the Boeing 777 that crashed at San Francisco International Airport on Saturday survived being thrown onto the runway when the back of the plane hit the seawall and the tail broke off, the National Traffic Safety Board said today.

The plane crashed into the runway when it came in too low and slow, Chairwoman Deborah Hersman said. The head pilot was only about halfway done with his training on the Boeing 777 and it was his first time landing that type of aircraft at SFO.

It was also the co-pilot's first trip as a flight instructor.

The complete cause of the crash is unknown, and likely won't be released for a few months, Hersman said.

Here's some of the information that has been released:

Seven seconds before the plane hit the seawall, someone in the cockpit asked for more speed, noticing that the jet was flying much slower than the recommended landing speed. A few seconds later, the yoke began to vibrate -- a warning telling the pilots that the plane was losing lift and was in danger of stalling. About two seconds before the plane crashed, a command was issued to abort the landing.