Egyptian riot police form a line behind an upturned and burnt car outside the Coptic Christian Saints Church, unseen, in the Mediterranean port city of Alexandria, Egypt, on Saturday, Jan. 1, 2011. A car exploded in front of the church early Saturday as worshippers emerged from a New Year's Mass, killing at least 21 people according to officials. (AP Photo/Ben Curtis)

Photo by: Ben Curtis

Egyptian riot police form a line behind an upturned and burnt car outside the Coptic Christian Saints Church, unseen, in the Mediterranean port city of Alexandria, Egypt, on Saturday, Jan. 1, 2011. A car exploded in front of the church early Saturday as worshippers emerged from a New Year's Mass, killing at least 21 people according to officials. (AP Photo/Ben Curtis)