"The skies over the Spanish island of La Palma offer many beauties, but on July 4th I witnessed something unusual: a ghostly green laser beam crossing the Milky Way," reports Jan Hattenbach from the Canary Islands. "I have learned that it was part of an experiment in quantum communication." . . . More:
http://spaceweather.com/archive.php?view=1&day=15&month=07&year=2011