Recent paper published on APL reported the ultrahigh power laser pulses have been sent vertically into the atmosphere. Scientists from Switzerland and France sent 26J, 32TW laser pulses delivered by the Alise beamline of the CEA-CESTA into the sky. They found more than 400 self-guided filaments. The white light was observed when the laser beam propagating up to the air, beyond 20km.
If you are interested this phenomena, you may download the full text paper from the APL website.