The Hajj and Eid al-Adha - The Big Picture - Boston.com
http://www.boston.com/bigpicture/2008/12/the_hajj_and_eid_aladha.html

Give to 7th grade SS teachers for Islam unit

Thousands of Muslim pilgrims cast stones at a pillar, symbolising stoning Satan, in a ritual called "Jamarat," the last and most dangerous rite of the annual hajj, near the Saudi holy city of Mina on December 8, 2008. To complete the ritual, a pilgrim must throw 21 pebbles at each of three 25-meter (82-foot) pillars and this year the faithful are being given pebbles in pre-packed bags to spare them the effort of searching for the stones.