雜誌裡有一段話，最後一行中的rendition在這段話裡，
要怎麼理解比較好呢？
(rendition原本有譯文;表演等意思)
Britain loaned the largest island, Diego Garcia, to America to use
as a military base. Since then the atoll, which is within striking
distance of east Africa, the Middle East and South-East Asia, has
become indispensalbe for America's armed forces, who nickname it
"the footprint of freedom". It gives them control over the Indian
Ocean and has served as a base for long-range bombers to pummel
Afghanistan and Iraq. The CIA used it as a "black site" in its
rendition programme.
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