10/01/2012 08:40 am ET | Updated Dec 01, 2012

Mistaken Sense Of Security Cited Before Envoy To Libya Died -

WASHINGTON — An effective response by newly trained Libyan security guards to a small bombing outside the American diplomatic mission in Benghazi in June may have led United States officials to underestimate the security threat to personnel there, according to counterterrorism and State Department officials, even as threat warnings grew in the weeks before the recent attack that killed Ambassador J. Christopher Stevens and three other Americans.