Blast Kills 16 in Pakistan

People look at damaged vehicles after a bomb blast in the Pakistani tribal area of Khyber, December 17, 2012.

A man walks past a burning vehicle after a blast in Khyber, Pakistan, December 17, 2012.

A woman looks through a window while a man who was wounded in a bomb attack at Fauji Market lies at the Hayatabad hospital in Peshawar, Pakistan, December 17, 2012.

People stand near coffins of people killed in a bomb blast in the Pakistani tribal area of Khyber, December 17, 2012.

Beginning the start of a four-nation trip, U.S. President Barack Obama steps down the ramp upon his arrival at Haneda International Airport in Tokyo, April 23, 2014.