U.S. Homeland Security employees locked out of computer networks: sources

By Dustin VolzWASHINGTON (Reuters) - U.S. Department of Homeland Security employees in the Washington area and Philadelphia were unable to access some agency computer networks on Tuesday, according to three sources familiar with the matter.It was not immediately clear how widespread the issue was or how significantly it affected daily functions at DHS, a large government agency whose responsibilities include immigration services, border security and cyber defense.Employees began experiencing pro