Terrorism is a subject that is worrying the World – and fear can set them apart from others. Scientists of the City University of London are making use of this inherent characteristic to ferret out probable terrorists. They are isolating the scent signal that appears in the sweat glands in humans who are scared. Those who indulge in terrorist activities appear to be normal human beings like the man next door but, his mind is always in turmoil. What if I get caught before I accomplish my mission? This mental attitude is reflected in the sweat they produce. US had already proved the theory by studying the underarm sweat collected in absorbent pads from skydivers. The equipment that would finally be developed would have to eliminate the smell of perfumes and other such items.