From The Washington Post:

By Michael Chertoff – Since leaving as secretary of homeland security in January 2009, I have talked with officials from friendly nations in Asia and the Middle East. Increasingly, I hear skepticism about whether the United States remains a reliable ally our friends can trust for support against attacks. These private conversations echo public statements by leaders in the Persian Gulf states and Asia expressing concern that they may have to fend for themselves in the face of military challenges from Iran, China or North Korea.