In addition, the Black Ops are encounter soon after. The Black Mesa Mods also shows Xen aircraft engaging US fighters, not long after the airstrike seems to stop. I am not sure if Half Life 1 show the airestrike failing but the bombing seems to stop rather quickly and Opposing Force shows many areas of Black Mesa intact as well as a need to nuke it rather than bomb it. The Xen aircraft most likely are responsible for Plan C failing by causing the US Airforce to no longer have total air superiority and so they probably just sent in the Black Ops. Plan C was to bomb Black Mesa with an airstrike.
Originally posted by CH:More like a plan D or E.
