Slight clarification - before 360 there's insufficient energy for a
*single-engine* TAL. That was clear from context in Joe's original post,
but with people replying to it I fear the context will be lost.

So after a single SSME failure and negative return (which is when?), you
have a "black hole" in the abort tree until 360s - at least before the post-
51L changes which made bailout possible? Duh.

Jan