after the explosions. police say they have no motives. they have not been able to determine who this suspect plating the bombs on the door steps are targeting. you can see down the line here, that's one of the homes where the box was placed on the door step. they don't know if the three explosives are similar or -- they know the three explosives are similar enough that authorities believe them to be linked. all three were boxes of medium-size left on people's door steps. they don't believe any official mail services, the post office, ups, fed ex, delivered them to their door. they're looking into figuring 0 it how the explosives were engineered. they're not giving us any type of detail on the mechanics behind this. i asked them what kind of person is able to pull something of this size off. they said it's someone that is very skilled and able to put an engineer, a bomb in a box, leave