Twelve U.S. men were indicted with participating in a global child pornography ring that distributed more than 400,000 pictures and videos of children engaged in sexual activities.

FBI and international authorities called the online ring, which was encrypted to keep investigators out, one of the most sophisticated child pornography operations in recent memory.

The men were charged with engaging in a child exploitation enterprise, conspiracy, advertisement of child pornography, transportation of child pornography, receipt of child pornography and obstruction of justice. They were:

--Michael Berger, 33, of Mechanicsville, Va.

--James Freeman, 47, of Santa Rosa Beach, Fla.

--Ruble Keys, 55, of Medford, Ore.

--Gary Lakey, 54, of Anderson, Ind.

--Marvin Lambert, 33, of Indianapolis.

--Neville McGarity, 40, of Medina, Texas.

--John Mosman, 46, of Waterbury, Conn.

--Warren Mumpower, 63, of Spokane, Wash.

--Raymond Roy, 54, of San Juan Capistrano, Calif.

--Erik Wayerski, 46, of Round Rock, Texas.

--Warren Weber, 56, of Boise, Idaho.

--Ronald White, 59, of Burlington, N.C.

Additionally, two other men were charged in connection with the ring but not included in the indictment. They were:

--Stepan Bondarenko, 38, of Philadelphia.

--Daniel Castleman, 43, of Lubbock, Texas.