there was a concern among faa officials that her plane might get caught in what's known as jet wash. the force of the air coming out of the back of the cargo plane, the c-17, that could be a dangerous situation. i'm told by this official at andrews that the faa sent the first lady's plane for what's known as a go around. this was the aborted landing very beefl, then once they cleared the runway, then mrs. obama's plane landed safely. now, obviously this is being investigated by the faa, especially in light of all the other incidents we've heard recently. we're told there appears to have been some sort of error by an air traffic controller. somewhere in the process that led to this chain of events. i want to stress that this official at andrews air force base told me, it's important to know the faa made the right call, and at no time was the first lady's life in danger. obviously a scare, but officials are stressing that mrs. obama's