1.   NATO, which forced the Serbs to pull their heaviest weapons downrange of Sarajevo recently, scrambled warplanes in response to the Serb attacks Sunday but did not strike.

2.   NATO, which forced the Serbs to pull their heaviest weapons downrange of Sarajevo recently, scrambled warplanes in response but did not strike at Serb targets.

3.   NATO, which recently forced the Serbs to pull their heaviest weapons from Sarajevo, scrambled warplanes in response to the Serb attacks Sunday but did not strike.

4.   NATO scrambled warplanes but did not strike at Serb targets.