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The oversight committees, particularly the HPSCI, became increasingly alarmed over the role US intelligence agencies were playing in the implementation of the administration's Central American policy. The issue of greatest concern was the CIA's support to the Contra rebels in Nicaragua.
the role of the villi is that it increases the surface area so that when food passes through the small intestine the food will get caught on the villi and the nutrients are ab â¦ sorbed into the blood.