The advent of Ti:Sapphire lasers in the 1990s leads to the first demonstration for attosecond XUV pulses in 2001. In last 5 years, carrier-envelope phase stabilized lasers at 1.6 to 2.1 micron based on Optical Parametric Chirped Pulse Amplification pushed attosecond light sources to the “water window” X-rays that cover the 280 to 530 eV photon energy range, which enabled real-time observation of electron and nuclear motion in molecules containing carbon, nitrogen and oxygen. Very recently it was used to probe ionization, vibration and rotation dynamics of nitric oxide with unprecedented temporal resolution.