5. The reason I only use 1 missile for this engagement is simple; no US aircraft has ever been fired on by an S-200 before. Therefore, the SR-71 will never even know it's been engaged and thus won't be maneuvering/evadingLaunching a Vega missile is not detectable by RWR's.
The only time US NAVY faced the Libyan S-200, they sent forward the Ticonderoga ships to detect the huge missile while flying.
(they did it successfully)