hand delivered, left on people's porches. police were telling people, be aware of the suspicious package left on your porch that has not been sent through the mail. sunday night, a trip wire which detonated a device injuring two people. now we have this explosion here at fedex, people are saying, we have to look out for everything. we were told to look out for hand delivered packages. now we have to be scared if everything. this city, austin, certainly on edge, people are scared, and the police are desperately trying to find this bomber before he strikes again. they even reached out to him on sunday and said, you know, please contact us. part of the issue is they don't know his motive. they don't know why he's doing this. they appealed to him to call him, he didn't, complete silence and a few hours later, he struck again. >> method change, shifting. >> evolving from people's home to the trip wire now to fedex,