WW, indeed. Nav Rad would hold the button and watch the NBS lights, plotter would have his finger on the button in the table. Both pilots would have theirs on the control stick.
Every button would be pressed.
Remember the aircraft would have flown the gauntlet of fighters, SA 2, SA 3, ADA, and maelstrom of hell. Who knew what damage it may have sustained or who might be incapacitated at the last moment.