U.S. Marine Corps bans Twitter , Facebook , MySpace and other social media sites . Order , issued today , states that posting on the sites poses a security risk . The Marines ' ban is effective immediately and will last a year . The Army recently ordered all U.S. bases to provide access to Facebook . U.S. Army recently ordered all U.S. bases to block access to Facebook .
U.S. Marine Corps bans Twitter , Facebook , MySpace and other social media sites . Order , issued today , states that posting on the sites poses a security risk . The Marines ' ban is effective immediately and will last a year . U.S. Army recently ordered all U.S. bases to block access to Facebook .