Oh, I'm sure it wasn't heard by the Asiana crew, but I just wanted to counter the criticism that the UAL crew sat there and said nothing..
There are two parts to the final seconds of Flight 214.
The part where they are low but still have time to do something about it and the part where nothing will prevent the plane hitting the seawall.
There is no point saying anything over the air during the second part and during the first part, the natural assumption is that the flight crew are dealing with it to ensure a successful outcome.
Any member of the UAL flight crew who is agonising over whether they should have spoken up, should spend a minute thinking about how they would feel if the PF Asiana 214 was about to apply thrust and was then distracted by a 'third voice' on the air shouting 'Watch out Asiana, you're too low!" which then may or may not have affected the outcome.
I know that I personally would spend the rest of my days thinking 'if only I'd kept quiet, two people may still be alive'.