The FBI and CIA received the warnings but did nothing, because Tamerlan Tsarnaev's activities had to do with Islamic jihad, and Obama’s FBI and CIA are forbidden to study Islamic jihad. The hapless agents probably had no clue as to how to understand what they were receiving from the Russians. This is because the Obama Administration in 2011, under pressure from Leftist pseudo-journalists and Islamic supremacist groups, mandated the scrubbing of counter-terror training materials of the truth about Islam and jihad.
Keystone Kops Alert: "Rep. Bill Keating: Russia insists U.S. could have averted Boston bombings," by Cheryl K. Chumley for The Washington Times, May 31 (thanks to Lookmann):
Russian intelligence gave enough advance information about Tamerlan Tsarnaev in 2011 that the Boston Marathon bombings could have been averted, one Massachusetts lawmaker suggested on Thursday.
Democratic Rep. William Keating hinted at the claim from Moscow, on the heels of several meetings with senior Russian Federal Security Service, or FSB, intelligence officials, The Boston Globe reported.
Specifically, FSB agents told Mr. Keating that they had disclosed to Federal Bureau of Investigation and Central Intelligence Agency officials of Tsarnaev’s plan to join with an Islamist uprising in Dagestan, located in the North Caucasus region, way back in 2011.
Had CIA and FBI agents acted on that intelligence, then the April 15 Boston terror attacks may not have occurred, FSB officials said to Mr. Keating, The Boston Globe reported.
Mr. Keating said Russian intelligence agents provided him with detailed information that proved beyond a doubt that Tsarnaev “had plans to join the insurgency,” the Globe reported....