Which is pretty much exactly what Dinah's thinking, too.

"I'm looking now."

The airport building is the closest, and she stops to examine a convenient part of rubble that's been knocked off the otherwise seemingly functional building.

"It's not fresh, but there are no plants growing on the rubble itself. Animals have been around, th..."

That's her interrupting herself when she finds what exactly has been covered by the rubble.

"About four weeks," she says, quietly and certainly.