The U.S. State Department continues to list Cuba as a state sponsor of terror, though most experts say the country no longer poses a threat to U.S. national security.

Whether to engage heads of rogue states, a perennial foreign policy dilemma, has emerged in the 2008 U.S. presidential campaign.

President Obama is generally supportive of the UN mission while raising questions about its effectiveness, but GOP candidate Mitt Romney is harshly critical of the organization.

The United States launched the Proliferation Security Initiative (PSI) in 2003 to help curb the proliferation of weapons of mass destruction (WMD). Since then, PSI membership has expanded sevenfold, …