Abe checks the back door to make certain that everything is secure, and finding that it is.  Meanwhile, Hal peers into the growing dawn light, looking for a car that might get them away.  Unfortunately, the ones he can see are all wrecked, inaccessible and probably don't have keys.  Even if they could get one started, it wouldn't hold everybody.

Then he sees it.  Across the street, hidden behind the  doors of the garage and only just visible through a narrow window at the top, the siren of a fire engine slated for repair...

As the two men discuss the situation, there's a general shuffling and movement from the rest of the survivors.  The father of the little girl comes up to Hal and Abe and says, "Guys, we can't stay here anymore.  We're moving today."  Behind him, people are packing up food and other necessities.  "Alex showed that we can move along the rooftops.  It will be slow going, but I think we can work our way to the high school from there.  So start packing, and may God have mercy on us."

Mary looks at Alex with concern.  "Alex," she says, "We can't take a truck.  You saw what happened to me.  It'd never work.  But we are going.  A bunch of us have decided that we're going to work our way across the rooftops where the... things can't reach us.  It's the only way.