authorities looking for potential bombs in. >> they're asking the public for help. not only trying to determine who could be behind this, whether it be an individual or a group of people so that is really key and keeping law enforcement on high alert. it's already paid off in terms of what the fbi is seeking public health in the robert deniro case. the police officer recognized the parcel based on the images that have been released through the media. he said, wait, this looks like the same type of package. it turns out that that is not considered one of the suspicious packages making it in. so that, a big part of this is keeping everyone on high alert and working with the u.s. postal service. >> the examiners say the devices are being examined at the quantico lab in virginia. what clues are they looking for in. >> wolf, this is an all hands on deck, federal, and state. the u.s. government dedicated a jet to fly around the country to