A Palestinian woman hold up portrait of incarcerated relative during a demonstration in front of the Red Cross headquarters in Gaza City marking Palestinian Prisoners, Day April 17, 2012. in solidarity with prisoners held in Israel. Some 1,200 Palestinian prisoners held in Israeli jails have begun a hunger strike and another 2,300 are refusing food for one day, Palestinians across the West Bank and Gaza Strip were marking Prisoners' Day in solidarity with the 4,700 Palestinian inmates of Israeli jails. UPI/Ismael Mohamad