The SA - 2 Guideline missile had a maximum range of about 30 kilometers at that time .
Since the bombers would be approaching the sites , their own guided missiles would have to be launched well - before missile entered this SAM range .
The SA - 2 Guideline missile had a maximum range of about 30 kilometers at that time , but since the bombers would be approaching the sites , their own guided missiles would have to be launched well - before it entered this SAM range .