Attosecond Science at the Linac Coherent Light Source

The study of ultrafast electronic phenomena requires light pulses that can access the timscale of electronic motion, which typically in the range of few- to sub-femtosecond. Free Electron Lasers (FELs), are a powerful source of short wavelength radiation, which is useful for probing quantum systems with atomic site-specificity. With recent technical developments, FELs are now able to produce pulses with durations reaching below one femtosecond. I will present the recent scientific developments achieved using the Linac Coherent Light Source (LCLS) to probe electronic motion on this extreme timescale. This includes pump/probe spectroscopy, X-ray wave mixing, and streaking experiments making use of an additional laser field.