JERUSALEM — The night was a getaway. Thousands of young men and women gathered at a vast field in southern Israel near the Gaza border to dance without a care. Old and new friends jumped up and down, reveling in the swirl of the bass-heavy beats.
Maya Alper was standing toward the back of the bar with teams of environmentally conscious volunteers, picking up trash and passing out free vodka shots to party-goers who reused their cups. Just after 6.a.m., as a light-blue dawn broke and the headliner D.J. took the stage, air raid sirens cut through the ethereal trap music. Rockets streaked overhead.
