Hearings to examine the nominations of Gentry O. Smith, of Virginia, to be an Assistant Secretary (Diplomatic Security), Rena Bitter, of the District of Columbia, to be an Assistant Secretary (Consular Affairs), Monica P. Medina, of Maryland, to be Assistant Secretary for Oceans and International Environmental and Scientific Affairs, and Marc Evans Knapper, of California, to be Ambassador to the Socialist Republic of Vietnam, all of the Department of State.