Palestinian youth face the "skunk" -an Israeli army water canon spraying foul smelling chemical water, during clashes following a demonstration marking Palestinian Prisoners' Day near the Israeli miltary prison of Ofer, in the West Bank city of Betunia, April 17, 2012. There are around 5,000 Palestinian prisoners who are still held in Israeli prisons and detention facilities, mostly inside Israel, in violation of the Fourth Geneva Convention, particularly Article 76 which stipulates that “protected persons accused of offences shall be detained in the occupied country, and if convicted they shall serve their sentences therein.” Anne Paq/Activestills