An adviser to the Department of Homeland Security — who was recently promoted — is defending his use of the controversial “R4BIA” four-finger salute symbol associated with the Muslim Brotherhood as decor on his Twitter profile, a choice that elicited criticism on Sunday on the social media site and from one Israeli blog.Mohamed Elibiary, one of 28 members of the Homeland Security Advisory Council, insists the symbol is “bigger than” the Muslim Brotherhood and that to him it means “Freedom4All.” In his Twitter profile, Elibiary describes himself as not only associated with Homeland Security but also as a “proud American”...