WASHINGTON — Close the cover on the CIA World Factbook: The spy agency announced Wednesday that after more than 60 years, it is shuttering the popular reference manual. The announcement posted to the CIA’s website offered no reason for the decision to end the Factbook, but it follows a vow from Director John Ratcliffe to end programs that don’t advance the agency’s core missions. First launched in 1962 as a printed, classified reference manual for intelligence officers, the Factbook offered a