This is a very serious issue. The TSA needs to start auditing everything that gets onto an airplane. They should designate secure areas in airports where everything and everyone that enters must undergo inspection beforehand. They should set up some kind of checkpoint for this purpose. It would be a good idea to have personnel verify the identity of individuals before they are allowed into the inspection area. Perhaps they could then have persons remove their personal belongings, including their potentially explosive pagers, and set them aside for separate inspection. They could even make them remove their shoes and belts for added safety. This might sound like a crazy idea right now but I think with sufficient research they might be able to build a machine that can detect metal, and require people to pass through this machine before being allowed through. They could have personnel stationed on the other end to conduct secondary inspections of passengers if needed. As for baggage and other personal belongings, they may be able to leverage a technology used in the medical industry, the X-ray machine, to see the inside of bags and electronic devices to detect concealed explosives or other prohibited items.

The current situation where they just let you walk straight in from outside right onto to the plane is unacceptable. Why hasn't anyone thought of this before?