The U.S. released 20 detainees from Guantanamo today. And 20 more came in to take their place. Here is the Pentagon's statement on the transfer.

There are still 660 prisoners at Guantanamo. 88 have been released to date. 84 went back to their home countries. 4 went to Saudi Arabia prisons for continued incarceration. Ouch.

Five of the men released this weekend went back to Pakistan, where they will be freed. The U.S. says it is negotiating with other countries to have some prisoners sent back "for a lengthy process of investigation, detention and prosecution." Six are scheduled for military tribunals, which are on hold while conditions for the trials are negotiated between the U.S. and Great Britain.

Since the Guantanamo prison opened in January, 2002, prisoners from 42 countries have been taken there for interrogation and detention. U.S. officials said their priority was to get intelligence to help avoid future terrorist attacks and keep dangerous people out of circulation.