from what i've been able to make out from conversations with a local bagel maker (he doesn't speak much english, and i don't know any arabic), the bagels are risen twice first, then boiled to create the crust, then baked.
so, i would guess most if not all of the yeast is killed when boiling.
The way that you wander is the way that you choose. The day that you tarry is the day that you lose.
Sunshine or thunder, a man will always wonder where the fair wind blows.