The California-based rock duo Eagles of Death Metal were swept up in a global terrorism drama Friday night while playing a packed house at Paris’ famed Bataclan concert hall. The theater seats about 1,500 people. Veteran multitaskers that they are, Jesse Hughes and Josh Homme packed a lot into the seven years between Heart On and Zipper Down. Homme returned to Queens of the Stone Age and started another band, Them Crooked Vultures, with Dave Grohl and John Paul Jones; Hughes became an ordained minister, appeared in a movie with Grace Jones and Iggy Pop, and worked on his solo project, Boots Electric. Perhaps it's not surprising, then, that Zipper Down feels more like the work of a side project than any of the duo's albums since Peace Love Death Metal.