Defending Scanners & Pat Downs
John Pistole, head of the Transportation Security Administration, says the inconvenience of body scanners and pat downs is a small price to pay for safety.
The debate over expanded screening touches on the proper balance between safety and civil liberties. Some legal experts wonder whether the TSA violates the Fourth Amendment protection against unreasonable search and seizure. Mr. Pistole is bracing for a grilling on Capitol Hill and likely legal challenges. But some critics, such as the former head of American Airlines Robert Crandall, question the TSA's methods from a security point of view. The agency treats each and every passenger as an equal terrorist threat. As a result, the vast majority of resources are devoted to where little threat exists.
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Here are 7 often-overlooked World Heritage Sites, each with its own history.
- UNESCO World Heritage Sites are locations of high value to humanity, either for their cultural, historical, or natural significance.
- Some are even designated as World Heritage Sites because humans don't go there at all, while others have felt the effects of too much human influence.
- These 7 UNESCO World Heritage Sites each represent an overlooked or at-risk facet of humanity's collective cultural heritage.
An innovation may lead to lifelike evolving machines.
- Scientists at Cornell University devise a material with 3 key traits of life.
- The goal for the researchers is not to create life but lifelike machines.
- The researchers were able to program metabolism into the material's DNA.
A new method promises to capture an elusive dark world particle.
- Scientists working on the Large Hadron Collider (LHC) devised a method for trapping dark matter particles.
- Dark matter is estimated to take up 26.8% of all matter in the Universe.
- The researchers will be able to try their approach in 2021, when the LHC goes back online.
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