The left will never admit it but Gitmo and the CIA black sites were instrumental in the war on terror in the years following 9/11.

WASHINGTON (AP) — In the early years after 9/11, the CIA turned some Guantanamo Bay prisoners into double agents then sent them home to help the U.S. kill terrorists, current and former U.S. officials said.

The CIA promised the prisoners freedom, safety for their families and millions of dollars from the agency’s secret accounts.

It was a risky gamble. Officials knew there was a chance that some prisoners might quickly spurn their deal and kill Americans.

For the CIA, that was an acceptable risk in a dangerous business. For the American public, which was never told, the program was one of the many secret trade-offs the government made on its behalf. At the same time the government used the risk of terrorism to justify imprisoning people indefinitely, it was releasing dangerous people from prison to work for the CIA.

The program was carried out in a secret facility built a few hundred yards from the administrative offices of the prison in Guantanamo Bay, Cuba. The eight small cottages were hidden behind a ridge covered in thick scrub and cactus.

Nearly a dozen current and former U.S officials described aspects of the program to The Associated Press. All spoke on condition of anonymity because they were not authorized to discuss the secret program publicly by name, even though it ended in about 2006.

Some of the men who passed through Penny Lane helped the CIA find and kill many top Al Qaeda operatives, current and former U.S. officials said. Others stopped providing useful information and the CIA lost touch with them.