WASHINGTON, Sept. 11 -- Rep. Robert J. Wittman, R-Virginia, issued the following news release: * * * Wittman Advocates for Law Enforcement Benefits in Honor of the 25th Anniversary of 9/11 * WASHINGTON, D.C. - Congressman Rob Wittman (VA-01) led his colleagues in sending a letter to Scott Kupor, Director of the U.S. Office of Personnel Management (OPM), highlighting differences in how some federal law enforcement officers are classified for retirement purposes and requesting OPM make changes  more