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The bottom line is how do we best provide for the security of the traveling public in light of a determined enemy who is adept at constructing well-designed, well-concealed devices which would not show up in a walk-through metal detector? We're trying to employ the best technology to identify any possible threat.

The technology used to detect if vehicles are carrying radioactive material is so sensitive it can tell if a person recently received radiation as part of a medical procedure.

I've been focused on detecting nuclear terrorism at ports, in cargo containers, and I developed and built detectors that are extremely cheap and also very sensitive. My other big development is a system to produce medical isotopes that are injected into patients and used to diagnose and treat cancer.

We are able to use technology to make it clear that someone's car is available or a room in a home is accessible; that there is an available desk in an office someplace.

I've always felt that technology can be used to our benefit and should be used to our benefit.

Lighter computers and lighter sensors would let you have more function in a given weight, which is very important if you are launching things into space, and you have to pay by the pound to put things there.

There is a shirt company that is making sensors that go into your clothing. They will watch how you sit, run or ski and give data on that information.

Just the idea to have everything you need essentially stored in one piece of portable technology is very exciting.