U.S. officials said the moves are part of an effort to rebuild U.S. intelligence capabilities that had continued to atrophy even as Russia sought to reassert itself as a global power. Over the past two years, officials said, the United States was caught flat-footed by Moscow’s aggression, including its annexation of Crimea, its intervention in the war in Syria and its suspected role in hacking operations against the United States and Europe. U.S. spy agencies “are playing catch-up big time” with Russia, a senior U.S. intelligence official said. Terrorism remains the top concern for American intelligence services, the official said, but recent directives from the White House and the Office of the Director of National Intelligence (ODNI) have moved Russia up the list of intelligence priorities for the first time since the Soviet Union’s collapse.