In this image taken Tuesday, Nov. 16, 2010 Muslim immigrants hold outdoor prayers for the festival of Eid-al-Adha, as a poster for the extreme right group Golden Dawn, reading "No mosque in Athens Never and nowhere" is seen in the foreground, in central Athens. Human rights and immigrant groups have warned of a sharp rise in anti-immigrant attacks in Athens in recent months, carried out by far-right groups. In Greece, alarm is rising that the twin crises of financial meltdown and continent-leading illegal immigration are creating the conditions for a right-wing rise _ and the Norway massacre on Monday Aug. 1. 2011 drove authorities to beef up security measures. (AP Photo/Petros Giannakouris)