Wolf Blitzer delivers the most important news and political stories of the day. Tune to The Situation Room weekdays 5-6:30pm ET on CNN.
Sanford police chief Bill Lee speaks exclusively to CNN's George Howell about how he handled the George Zimmerman case.
RELATED STORY: Zimmerman declines to testify; defense rests
Watch a dog food machine powered by dogs. CNN's Jeanne Moos reports on the doggie domino effect.
CNN's Paul Vercammen flies with a professional pilot to illustrate a typical approach to the San Francisco airport.
RELATED STORY: NTSB urges caution on apportioning blame in Asiana crash
Police say they are treating the runaway train disaster in Canada as a criminal investigation. Anna Coren reports.
The NTSB chairman describes the experience of the pilots in the Boeing 777 that crashed in San Francisco.