Apparently, 2 US Airmen where killed, and 2 others wounded in Germany. Here are a few links to news station coverages:
2 U.S. airmen shot dead at German airport - World news - Europe - msnbc.com
USAFE Airmen killed, wounded in Frankfurt airport shooting
Terrorism Eyed in Attack at German Airport That Killed 2 U.S. Airmen - FoxNews.com
2 U.S. airmen shot dead at German airport - World news - Europe - msnbc.com
USAFE Airmen killed, wounded in Frankfurt airport shooting
Terrorism Eyed in Attack at German Airport That Killed 2 U.S. Airmen - FoxNews.com