11.   The Croats claimed they were nearing a rebel Serb airfield at Udbina, north of Gracac, which had been used for air attacks on Bihac.

12.   The NATO airstrike on a Serb airfield in Croatia highlights the dilemma of U.N. peacekeepers in former Yugoslavia and their vulnerability to retaliation.

13.   The NATO attack on a Serb airfield in Croatia highlights the dilemma of U.N. peacekeepers -- and their vulnerability to retaliation.

14.   The top U.N. official in former Yugoslavia suggested Thursday that NATO was out of line in requesting permission for its warplanes to attack a rebel Serb airfield.

15.   Three weeks ago, NATO requested an airstrike on a Serb airfield in the northern stronghold of Banja Luka, but was refused by the senior U.N. commander.

16.   U.N. officials said the Croats had also taken a key rebel Serb airfield at Udbina, northwest of Knin, early Sunday.