News bites: Hope you pass the 'sniff test'

Your morning transportation speed-read:

Some are proposing walk-through "sniffers" as a way to speed up screening at airport security checkpoints.

President Obama is continuing to take credit for the recovery of the car industry with interviews with local TV stations in Detroit and Cleveland:

Former Chicago Mayor Richard Daley's son may have benefited from a deal to bring WiFi to O'Hare International Airport.

A Chicago commuter railway is introducing quiet cars on some of its trains.