Don't make me laugh... A B-2 shot down?? The only phases in a flight of a B-2 where appears major indiscretions which could be used for a missile
launch are Take-Off, Landing, and Bombing. I don't think the first phases were considered.
Left the Bombing phase, when the bombing bays (dunno the word in english, forgive me

) are opened. That means about 3 seconds for each bomb, and
about triple this time to open and close the bays. In this time, the launcher (it must be a Radar Missile, an IR or EM missile can just simply not
climb up there where the B-2 flies...) must acquire the plane, find a fire solution, launch, and then climb to the Spirit flight level... And of
course avoid the jammers of the plane which constantly creates other echoes around its real position! That sounds a bit hard to me. And even with a
so-called ultrapowerful long wave radar that detects Stealth planes, the ERS ( Equivalent Radar Surface, the shape of an echo on a military radar
screen (SAR in french, surface équivalente radar)) of the Spirit is about the shape of a crow, or even worse of a duck...
Yeah, if you know that you're being inbound, you can for sure track every bird you spot... But a sam-site has discriminators, like an AWACS radar
doesnt count the ground echoes flying under 120kt, the radar of a sam wouldn't count such a little echo!
God, it must be easier to get a RPG-7 near an US airbase, like Elmendorf, where Spirits may be placed, and shoot it from visi range when it takes
off... Than to shoot it down in flight with a Sam battery!
Anyhow, I don't trust a single word of this story!
(Please dont accuse me of being partial with the US, I'm not american, so it's not being patriotic, its being realistic

)