sentences:  Member nations of the Coalition withdrew their forces as public opinion favoring troop withdrawals increased and as Iraqi forces began to take responsibility for security.In late 2008, the U.S. and Iraqi governments approved a Status of Forces Agreement effective through to the end of 2011.The Iraqi Parliament also ratified a Strategic Framework Agreement with the U.S., aimed at ensuring international cooperation in constitutional rights, threat deterrence, education, energy development, and other areas.