On Monday evening, a handful of carolers from the Queer Liberation Army serenaded workers at the Burlington office of weapons-maker General Dynamics. The singers huddled on the sidewalk out front, clutching antiwar signs in their gloved hands. "Hark! The QLA doth say," they warbled to the tune of "Hark! The Herald Angels Sing," "Peace and love are here to stay. / Raise your joyous voices high, / don't let little children die." Several G.D. employees watched the group warily from a front office. A few honked, or gave the peace sign as they drove off. Others turned away.