It happens every Friday. Palestinians, left-wing Israelis and international protestors gather in the Palestinian West Bank village of Ni'ilin to demonstrate against the construction of
Israel's security barrier. It has been the scene of regular clashes with Israeli security forces.
But Friday, March 13, the usual stone-throwing clashes took a more serious turn when 38-year-old American peace activist Tristan Anderson of Oakland, Calif., was hit in the head by an Israeli tear gas canister.