Bro. I apologize for my attuitude. It was very uncalled for, and I have been doing that alot lately. Sometimes I should take more deep breaths with a 10-count I think. Your news about imported items is nothing new though, as imports have always been x-rayed for years. If they are coming in from a "target" Country, then that is always the first step in the process of determining wether or nor there is contraband inside the parcel. If the parcel was sent EXPRESS(EMS) to boot, then the chances increase that it could get x-rayed despite the Country of origin.
As far as Domestic packages. I didn't hear of any LAWS being passed about that. I do think that if you asked "is it out of the realm of possibility that this will happen with Domestic Express Mail" though, I would say that the chances of this happening in the near futre are EXTREMELY good. I have read articles that indicate that an increasing amount of Express Mails are already being x-rayed with a higher level of occurrence.
Laws or no laws, you have to figure this: It is in the best interest of the delivery companies(Fed-Ex, UPS, & USPS) to want to x-ray packages going on planes(especially their planes). After 9/11, I'm sure that the powers that be for all 3 companies realized the HUGE financial collapse possible if ever some kind of mail bomb were placed on one of their planes, thus destroying it. Lose a plane...lose packages...lose a ton of business + the coin they lost on the plane being destroyed to start with. Even if it were not one of their birds, you could only imagine the amount of lawsuits to follow by the families of victims, once they find out that these companies were not taking reasonable safety measures with the cargo they were loading onto a commercial airliner.
I think this will happen, if it hasn't yet(as far as it being LAW I mean). ANYTHING(speaking of parcels) that must go onto a plane to make its' final destination will be x-rayed. That includes Priority, and 3-day-Select services as well. If they go airborne, then they will get x-rayed. Can you say Gound Mail?