Retired Adm. Winnefeld on National Guard at border, U.S. troops in Syria
CBS News military and homeland security analyst Sandy Winnefeld, a retired Navy admiral and former vice chairman of the Joint Chiefs of Staff, joins "CBS This Morning" to discuss President Trump signing a proclamation ordering National Guard troops to be deployed to the U.S.-Mexico border and the inconsistency in statements from his administration regarding U.S. troops in Syria.