WASHINGTON -- The United States is hunting for American-born Yemeni cleric Anwar al-Awlaki, White House Press Secretary Robert Gibbs said Sunday.

Awlaki is on a list of US citizens that U.S. forces are unconstitutionally authorized to capture, or kill, senior administration officials say.

http://www.foxnews.com/politics/2010/05/23/gibbs-actively-searching-yemeni-cleric-al-awlaki/