Two former officials of a pro-Israel lobbying group were charged in an indictment filed Thursday with illegally conspiring to gather and disclose classified national security information to journalists and an unnamed foreign power that government officials identified as Israel. The indictment accused Steven J. Rosen and Keith Weissman, formerly senior staff members at the American Israel Public Affairs Committee, with improperly disclosing national security information beginning in April 1999. The group dismissed the two men last April. As the committee's director of foreign policy issues, Mr. Rosen was a highly visible figure in Washington who helped the organization define its...