Steinn Sigurdsson (Penn State U)
Recent observations have increased interest in the possibilities of a significant population of black hole binaries in the local universe. Natal kicks may play a crucial role in the merger rate of stellar mass black holes. Dynamical evolution can lead to an enhanced interaction rate for compact binaries in dense stellar systems and a distinct and richer population of compact binaries. I discuss some of the issues related to black hole binary formation and coalescence, and the issue of retention in globular clusters. I speculate on some possible signatures that might distinguish the cluster black holes from the field population.