Police stations packed ; some wait hours to get home . Possible plot from Somali group ; security level remains same . 58 agencies are involved in the massive inaugural security effort . The security effort involved Secret Service agents ; 8,000 police officers from the District of Columbia and other jurisdictions ; 10,000 National Guardsmen ; about 1,000 FBI personnel ; and hundreds of others from the Department of Homeland Security , the National Park Service and U.S. Capitol Police . Because of this , parts of the Mall were sealed off at 9 a.m .
Police stations packed ; some wait hours to get home . Possible plot from Somali group ; security level remains same . 58 agencies are involved in the massive inaugural security effort . Because of this , parts of the Mall were sealed off at 9 a.m .