Thad watched all the people board while his stepdad read the paper. What would an air marshal look like and where would he sit? Probably toward the back, an aisle seat. In jeans and a jacket, maybe. The slightly pudgy man sitting in front of them stood in the aisle, trying to figure out where to try to stash his laptop case. It was a tight fit under the seat, and as he awkwardly maneuvered it into position, the man was clearly aware that there were people waiting to get to their seats farther back; his face kept getting redder.