"U.S. military satellites spied Russian troops amassing within striking distance of Crimea last month. But intelligence analysts were surprised because they hadn't intercepted any telltale communications where Russian leaders, military commanders or soldiers discussed plans to invade," the Wall Street Journal reports.
"America's vaunted global surveillance is a vital tool for U.S. intelligence services, especially as an early-warning system and as a way to corroborate other evidence. In Crimea, though, U.S. intelligence officials are concluding that Russian planners might have gotten a jump on the West by evading U.S. eavesdropping."
"To close the information gap, U.S. spy agencies and the military are rushing to expand satellite coverage and communications-interception efforts across Russia, Ukraine and the Baltic states. U.S. officials hope the 'surge' in assets and analysts will improve tracking of the Russian military and tip off the U.S. to any possible intentions of Russian President Vladimir Putin before he acts on them."