A camera was invented which can see explosive, drugs and weapons hidden under clothing from a distance of 25 meters by Thruvision Company. This system could be useful at airports, railway stations and other public places. The Thruvision system works with the help of tera hertz rays or T-rays so this is not harmful to people. So it is the best security system over the pervious X-ray security systems. The electromagnetic radiation of the T-rays is emitted by the people and objects and in turn pass through clothing, paper, ceramics and wood.These rays don’t pass through metal and water.
So be careful thieves and smugglers 
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I heard on the news yesterday of in Britain they use this kind of technology in their airports that are pretty revealing