package bomb plot targeting the u.s. international investigators are stepping up the search for suspected bomb maker ibrahimal as sere ri, a high-ranking member of al-qaeda in the arabian peninsula, and now officials are warning local law enforcement and emergency crews to be on the lookout for more suspicious packages from overseas. let's talk about it with bob strang, a former federal agent. he was co-chair of the post-9/11 antiterrorism task force. the scary thing is that we might not have gotten ahold of all of the packages that were sent last week? >> that's right, jon. we know that there were 20 for sure that were sent, but the bottom line is we don't know whether there are still parcels in the mail today as we speak that are in the belly of an airplane sitting in an office, a car, they could be anywhere in the world. and when you think about the plot and the logic behind it, i mean, this is a scary thought. it's a loose link in our security system globally when we put cargo on airplanes and don't check it. and, clearly, this is a big fear