The 21st International Conference on Laser Spectroscopy will feature the latest developments of all forms of laser physics and spectroscopy. The conference will cover a broad range of exciting physics, such as precision tests of fundamental symmetries with atoms and molecules, ultra-fast atomic and molecular dynamics, quantum many-body physics with ultra-cold atoms, mesoscopic and artificial atoms, and quantum information science with trapped ions. ICOLS 2013 will be held on June 9-14, at the Claremont Hotel near the University of California, Berkeley (near San Francisco), USA.