Two years ago, in one of the most deadly hate crimes at a place of worship in recent US history, six Sikhs were gunned down in Oak Creek, Wisconsin.

In post-9/11 America, there have been several violent attacks against Sikhs, but the scale of this tragedy forced the community to take notice - and action.

Now they are fighting back with an aggressive awareness campaigns.

The BBC's Brajesh Upadhyay reports.