IE 11 is not supported. For an optimal experience visit our site on another browser.

US cites 'red line' weapons in move to intervene in Syria

12:10

Andrea Mitchell, NBC News chief foreign affairs correspondent and MSNBC host, talks with Rachel Maddow about breaking news that the U.S. government believes the Assad regime has used chemical weapons against rebels in Syria, and is therefore considering intervening in that civil war, with pressure from Senator John McCain to escalate what will amount to a proxy war with Iran.