An American soldier in Iraq opens fire on a counseling center at Camp Liberty in Baghdad, killing five other US soldiers and wounding three.

Iraq, officially the Republic of Iraq, is a country in West Asia. It is bordered by Saudi Arabia to the south, Turkey to the north, Iran to the east, the Persian Gulf and Kuwait to the southeast, Jordan to the southwest, and Syria to the west. The country covers an area of 438,317 square kilometres (169,235 sq mi) and has a population of over 46 million, making it the 58th largest country by area and the 31st most populous in the world. Baghdad, home to over 8 million people, is the capital city and the largest in the country.

On May 11, 2009, five United States military personnel were fatally shot at a military counseling clinic at Camp Liberty, Iraq by Army Sergeant John M. Russell. In the days before the killings, witnesses stated Russell had become distant and was having suicidal thoughts.

Camp Liberty is a former installation of the United States Department of Defense in Baghdad, Iraq. The installation was used from 2012 to September 2016 to house members of the People's Mujahedin of Iran, who had been forcibly evicted from Camp Ashraf.

Baghdad is the capital and largest city of Iraq, located along the Tigris in the central part of the country. With a population exceeding 7 million, it ranks among the most populous cities in the Middle East and Arab world and forms 22% of the country's population. Spanning an area of approximately 673 square kilometres (260 sq mi), Baghdad is the capital of its governorate and serves as Iraq's political, economic, and cultural hub.

May 11 is the 131st day of the year in the Gregorian calendar; 234 days remain until the end of the year.