November 1, 2001
Source: CNN.com
http://www.cnn.com/2001/US/11/01/rec.attacks.sikhs.ap/index.html
On November 1, 2001, CNN.com reported that "followers of the Sikh faith say they have been unfairly singled out for elaborate security checks at airports, sometimes being forced to remove their turbans, an integral part of their religious identity."