PHOTOS: Wave of deadly car bombings in Iraq

An Iraqi policeman stands near burning vehicles moments after one in a series of bombs hit the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

An Iraqi policeman gestures near burning vehicles moments after one in a series of bombs hit the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( APTOPIX Mideast Iraq )

Iraqi policemen stand near burning vehicles moments after one in a series of bombs hit the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

Iraqi security forces stand guard while firefighters try to extinguish burning vehicles moments after one in a series of bombs hit the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

Iraqi firefighters try to extinguish burning vehicles moments after one in a series of bombs hit the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

Iraqi security forces stand guard as firefighters try to extinguish burning vehicles moments after one in a series of bombs hit the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

Iraqi firefighters extinguish vehicles after a car bomb explosion in the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

Civilians inspect a damaged vehicle in the aftermath car bomb attack on Monday in Baghdad northeastern district of Shaab, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

Security forces and civilians inspect the site of a car bomb explosion in the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

Civilians inspect a damaged vehicle in the aftermath car bomb attack on Monday in Baghdad northeastern district of Shaab, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

Iraqi firefighters extinguish vehicles after a car bomb explosion in the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

Civilians inspect the site of a car bomb explosion in the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

An Iraqi man looks at burning vehicles moments after one in a series of bombs hit the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014. (AP Photo/Karim Kadim) ( Mideast Iraq )

Civilians inspect the site of a car bomb explosion in the Shiite stronghold of Sadr City, in Baghdad, Iraq, Tuesday, May 13, 2014.(AP Photo/Karim Kadim) ( Mideast Iraq )

An Iraqi inspects damage at a garage on May 13, 2014 following a car explosion in the capital Baghdad's central commercial district of Karrada. AFP PHOTO / SABAH ARAR/AFP/Getty Images ( 529714579 )

Iraqis inspect damage at a garage on May 13, 2014 following a car explosion in the capital Baghdad's central commercial district of Karrada. AFP PHOTO / SABAH ARAR/AFP/Getty Images ( 529714581 )

Iraqis inspect damage at the site of a car explosion on May 13, 2014 in Baghdad's northern Shiite-majority district of Sadr City. AFP PHOTO / AHMAD AL-RUBAYE/AFP/Getty Images ( 529715426 )