attacks in the period of august and beyond. prepare to shut down on sunday. we're talking about u.s. diplomatic sites in other cities where demonstrators put u.s. flags in lighter fluid. this all coincides with the end of ramdan. we have our pentagon correspondent standing by. dana bash is on capitol hill, where lawmakers were briefed about. give us more details about this threat out of yemen. >> u.s. intelligence agencies have been monitoring this for months we are told. a growing threat stream out of