Using his clout as supervisor, Schardin got the help of the Gestapo to find the man he now needed most. Gestapo headquarters finally managed to get Schardin and Misznay together, but there is no exact record of their conversation or of the mathematical conclusions on which they agreed. Professor Schardin came away from the meeting with enough information relative to direction-effect fragmentation explosives to start development on radically new rocket warheads. He intended to use them to shoot down the American Boeing B-17 bombers then devastating Germany and to thwart Josef Stalin's heavy tanks on the Eastern Front. Schardin knew that the military situation was desperate, and he reacted accordingly.
Directional explosives throw fragments from the face of an explosive charge.
Those explosives differ from a regular circular bomb, which propels pieces off its casing in a random manner. Some humans near the blast of a conventional bomb may be spared injury, while others at relatively great distances may catch a piece of random shrapnel. Conventional bombs are not predictable, while directional explosives are very predictable. Schardin took that necessary information back to TAL in Berlin. Americans actually started a precursor to the Strategic Defense Initiative program in 1944, when they tried to develop weapons based on the Misznay-Schardin effect to shoot down German rockets.