Well, I think first, Serbia needs to bomb some briges in Berlin to return the favour....
April 13,
1999
BRUSSELS, Belgium (CNN) --
The NATO pilot who bombed a rail bridge in southern Serbia was unable to see a passenger train on the bridge until the instant before his missile struck, NATO's top general said Tuesday.
http://www.cnn.com/WORLD/europe/9904/13/nato.attack.03
2007
Military vehicles on a road in the Albanian part of Kosovo.
Portuguese KFOR troops bar the approaches to diplomatic missions in Kosovska Mitrovica.