nicole collins joins us live from washington, d.c. with the latest. >> reporter: dave, those attacks on hotels and restaurants were reportedly supposed to happen in a simultaneous nature over the course of one weekend. cbs news reports that this plot involved slips ricin or sign identify in -- cry an identify into a -- sighenned a identify. the department of homeland security tell us it does not comment on reports of specific planning and sources say there is no specific intelligence to report this -- to support this claim. meanwhile, eric holder told abc news this morning, he's confident the u.s. will continue to thwart attacks but warn the american people have to be prepared for bad news saying the threat is real and constant. holder said the evolving threat of home-grown terrorism particularly keeps him up at night. he said 50 american citizens have been instated -- indicted on terror-related charges over the past two years. he says they all have something else in common. it's a connection to this man. this man, an american citizen, believed to be hiding in yemen, h