The U.S. intelligence community has added Cuba to its classified list of nations at risk of instability in about two to five years because of growing concerns over the health of Cuban leader Fidel Castro, U.S. officials have confirmed. The National Intelligence Council, the community’s main center for middle and long range analysis, based at the CIA in Langley, Va., added Cuba to the three-part list during its last biannual update in October, the officials added. Full Story