Interesting messages from the ISS by light.
NASA Science News for June 18, 2014
In early June, a laser beam lanced out of the night sky over California, heralding a breakthrough in space communications.
FULL STORY: http://science.nasa.gov/science-news/science-at-nasa/2014/18jun_opals/
SCIENCECAST VIDEO: http://youtu.be/S8uL8ox-SlQ