1.  And Croatian forces said on Sunday that Serbian planes had bombed villages in the Croat-held Usora River valley of northern Bosnia, causing dozens of civilian casualties.

2.  At the request of U.N. military commanders, the raid did not hit Serbian planes at the airfield.

3.  At midafternoon, after the bombing and shelling has stopped, we hike into the hills and find the wing and tail lights of a Serbian plane.

4.  NATO said Wednesday that it spotted two Serbian planes Tuesday over the no-flight zone in northern Bosnia and had requested U.N. permission to bomb them.

5.  Serbian nationalist planes flying from Udbina have crossed the border as well.

6.  Still, the Udbina mission was intentionally limited to cratering the airfield, leaving Serbian planes and fuel dumps intact.