No. 89-5441. Argued November 1, 1990. Decided November 30, 1990. George A. Lehner, Washington, D.C., for appellant. Mark E. Nagle, Asst. U.S. Atty., with whom Jay B. Stephens, U.S. Atty., John D. Bates and R. Craig Lawrence, Asst. U.S. Attys., Washington, D.C., were on the brief, for appellee. Appeal from the United States District Court for the District of Columbia (Civil Action No. 86-1057). Before BUCKLEY, WILLIAMS and THOMAS, Circuit Judges. Opinion for the Court filed PER CURIAM. PER CURIAM: