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.

After more than three decades of existence, the Group of Eight (G8) is struggling to defend its relevance amid criticism of its limited membership and lack of a compliance mechanism.

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, …