Nation’s top spy orders broad review into US government handling of intelligence information before Boston Marathon bombings

The nation’s top spy on Monday requested a broad review into “the US government’s handling of intelligence information leading up to the Boston Marathon bombings,” according to an internal memo obtained by the Globe. The memo is the latest evidence of concern that warning signs may have been missed that could have prevented the worst terrorist assault on American soil since the Sept. 11, 2001, attacks. Full story for BostonGlobe.com subscribers.