In its editorial Wednesday, April 25, The Washington Post charges that U.N. observers in Syria are providing cover and even targets for the regime of Bashar Assad. Areas toured by the observers earlier this week were later shelled by security forces, which also carried out sweeps in which civilians suspected of speaking to the observers were taken from their homes and shot or had their houses burned down. The failure to stop the bloodshed in Syria eerily resembles the United Nations’ handling of Bosnia, where an attempt to stop attacks on civilians by dispatching lightly armed peacekeepers led to the worst massacre in postwar European history. But sending unarmed monitors to besieged cities and shrugging when the people they visit are murdered is not everything the United States can do.