Forty years ago, the 1,000 natives on the tiny atoll were reportedly relocated to make way for a joint US/UK military base.
No one knows what it is used for. Retired Army General Barry McCaffrey and Lawrence Wilkerson, chief of staff to former Secretary of State Colin Powell, allege the CIA uses it as a black site for enhanced interrogation of high-value terrorists, including Khalid Sheikh Mohammed.
The US government adamantly denies such charges.