Many rights groups have expressed concern this month over what they said was a rising number of anti-Muslim attacks, including the stabbing of a Muslim cab driver in New York, an arson attack against a mosque construction site in Tennessee and vandalism against an Islamic center in California. The threat by a Florida pastor to burn Korans marked only the most recent episode, as controversy over the proposed building of a mosque near Ground Zero – as well as the ongoing political election campaign – continue to fuel tensions. Duration: 01:54.