IWA is German outdoor convention. There are a few outlets covering it.
Shooting Wire and
Tactical Wire
Soldier Systems
http://soldiersystems.net/2013/03/12/a-quick-tour-iwa/
http://soldiersystems.net/2013/03/12/a-quick-tour-iwa-take-2/
From: Shooting Wire, Tactical Wire, Soldier Systems