They acted alone, eh? That is looking increasingly unlikely. "Boston bombs showed some expertise," by Brian Bennett, Richard A. Serrano and Ken Dilanian for the Los Angeles Times, April 24 (thanks to Benedict):
WASHINGTON — Investigators said the two Boston Marathon bombs were triggered by long-range remote controls for toy cars — a more sophisticated design than originally believed — bolstering a theory that the older suspect received bomb-making guidance on his six-month trip to Russia last year.
Tamerlan Tsarnaev, who died in a shootout with police last week, "more than likely got some instruction in Dagestan," a federal law enforcement official said Wednesday.
The official said investigators continued to believe that Tsarnaev, 26, and his brother, Dzhokhar, 19, were radicalized in the U.S., and that no foreign terrorist group orchestrated the plot.
Nevertheless, the CIA revealed Wednesday that it had asked the FBI and other federal agencies to put Tamerlan Tsarnaev on the terrorism watch list in October 2011 after receiving information from Russia. His name was not placed on a no-fly list, but it was circulated to various intelligence and domestic security agencies.
The information the CIA received "was nearly identical to the information the FBI received in March 2011" from Russia, one official said — unspecific allegations that he had become an Islamic extremist.
The CIA shared all the information provided by the foreign government including two possible dates of birth, his name and a possible name variant as well, an official said.
FBI and Russian security services have been conducting interviews separately in the Dagestan area since the Tsarnaev brothers became suspects in the bombings last week, according to a federal law enforcement official. The agencies are talking to Tsarnaev family members, including the father of the brothers....