An Iraqi riot police officer flashes the V-sign as his unit returns to its headquarters from clashes with al-Qaida fighters in Basra, Iraq's second-largest city, in the restive Anbar Province. Nabil al-Jurani/AP hide caption

itoggle caption Nabil al-Jurani/AP

In Fallujah on Saturday, Sunni fighters turned out for the funeral of a man killed by Iraqi army artillery fire. Mohammed Jalil /EPA/LANDOV hide caption

itoggle caption Mohammed Jalil /EPA/LANDOV

Mourners carry the coffin of a victim of a bomb attack on a Baghdad cafe on Tuesday. Violence in Iraq has spiked this year. The bodies of 18 men were found Friday in a Sunni area near Baghdad. Sabah Arar/AFP/Getty Images hide caption

itoggle caption Sabah Arar/AFP/Getty Images

Iraqi Prime Minister Nouri al-Maliki is welcomed by Vice President Biden in Washington on Wednesday. Maliki is asking for U.S. military hardware to fight radical groups behind a recent surge in violence in Iraq. Cliff Owen/AP hide caption

itoggle caption Cliff Owen/AP

Mourners carry the coffin of a car bomb victim during the funeral in the Shiite holy city of Najaf, Iraq, last week. Violence is on the rise in Iraq, but it is receiving little international attention. AP hide caption

itoggle caption AP

Syrian refugees stand in line for food at Kawergost refugee camp in Irbil, Iraq, on Aug. 21. The Syrian civil war has already sparked a refugee crisis in the region. Now, many countries are waiting to see the effects of a possible U.S. military strike. Hadi Mizban/AP hide caption

itoggle caption Hadi Mizban/AP

Subway passengers affected by the sarin gas attack on Tokyo's subway system are carried into St. Luke's International Hospital in Tokyo on March 20, 1995. Thirteen people were killed and more than 6,000 injured in the attack, which was carried out by the Aum Shinrikyo cult. Chikumo Chiaki/AP hide caption

itoggle caption Chikumo Chiaki/AP

Then-Iraqi dictator Saddam Hussein (at right) behind an artillery piece during the Iraq-Iran war. (An undated photo from the 1980s.) Reuters/Landov hide caption

itoggle caption Reuters/Landov

Iraqis walk past a wall that a car bomb destroyed, next to the Ahl al-Bayya' mosque in southeastern Baghdad Monday. At least 10 bombings were reported in the city today. Ali Al-Saadi /AFP/Getty Images hide caption

itoggle caption Ali Al-Saadi /AFP/Getty Images