 A Joint Chiefs of Staff memo reported by "The Wall Street Journal" in 1966 urged President Johnson to "expand" the use of non-lethal chemicals in South Vietnam.The use of 3-Quinuclidinyl benzilate or Agent BZ was alleged in Operation White Wing by journalist Pierre Darcourt in "L'Express" news magazine.The allegation concerned an offensive and the 1st Cavalry Division in March 1966 during Operation "White Wing."