'Nobody kill anybody': Murder-free weekend urged in Baltimore

O'Hare International Airport

Airport security disarray

Airport security disarray

This week's departure of Kelly Hoggan as head of security for the embattled Transportation Security Administration is a nice start to a management shake-up, but it won't probably bring much comfort to travelers stuck in long lines in the nation's airports. No, that would have at least required Mr. Hoggan to take off his shoes, empty his pockets and submit to a full body scan — but only after two hours of anxiously milling about in a crowd of strangers.

How bad might it be in TSA security checkpoints this summer? At O'Hare International, where backups have been particularly pronounced this month, hundreds of passengers have missed their flights. Airlines had to ask passengers to...