A Palestinian militant from al-Aqsa Martyrs Brigades, an armed wing of President Mahmoud Abbas' Fatah movement, holds up his weapon during a rally against Hamas in the West Bank city of Jenin May 16, 2007. At least 16 Palestinians were killed in fierce factional fighting in Gaza on Wednesday and Israel entered the fray with an air strike on a Hamas position that killed at least four gunmen. [Reuters]

1

2

3