Sikh Americans on Monday protested what they said was a new policy at US airports to screen their turbans systematically, voicing fear the move would further stigmatise their faith. US officials did not confirm a change in policy and insisted they respected religious beliefs. But they said security measures necessitated checks on "bulky" clothing such as turbans, which Sikh men are required by faith to wear. A group of Sikh American groups said they met several weeks ago with representatives of the Transportation Security Administration (TSA) who told them that airports would now screen turbans with hand-wands at all times....