Report: No missed opportunities in Boston attack

A review of how the government's intelligence agencies handled information they had before the Boston Marathon bombings last year has concluded that it was impossible to know whether anything could have been done differently to prevent the attack.
Whether information withheld by Russia until after the bombings could have made a difference was not addressed in the unclassified version of the report. Even if the FBI had received details from the Russian wiretaps involving one of the bombing suspects, it's not clear that the US government could have stopped him.
Three people died and more than 200 others were injured in two explosions during the Boston Marathon on April 15, 2013.

Two ethnic Chechen brothers are accused of carrying out the attacks. Tamerlan Tsarnaev died in a police chase and his brother, Dzhokhar, has pleaded not guilty to 30 federal charges, including using a weapon of mass destruction.
The Obama administration briefed Congress yesterday on the intelligence community inspectors general's review.
"We will always ask ourselves what more we could have done to prevent this or another tragedy. What we may never understand is why the Russians didn't share more with us to aid in the FBI's investigation," said Rep. CA Ruppersberger, the top Democrat on the House Intelligence Committee.

Highlighting Russia's role in potential intelligence failures comes as relations between the two countries are the worst they've been since the Cold War, the deterioration coming over the past year.

Russia's reluctance to share information with the US government that might have helped prevent a terror attack on American soil was one of the first major cracks in the relationship.
Members of Congress have grown increasingly skeptical about the effectiveness of US-Russian cooperation on law enforcement or other matters.
In 2011, Russian authorities told the FBI they were worried that one of the suspected bombers, Tamerlan Tsarnaev, and his mother were religious extremists. The Russians were unresponsive when pressed by the FBI for more details.
It was only after the 2013 attack that the US intelligence community learned that the Russians withheld some details that might have led to a more thorough FBI investigation.

The Russians told US officials that they secretly recorded a telephone conversation in 2011 in which Tsarnaev vaguely discussed jihad with his mother, which The Associated Press first reported weeks after the attack.
In another conversation, the mother was recorded talking to someone in southern Russia who is under FBI investigation in an unrelated case, officials have said.