The science behind building a proximity fuze in 1942 is just mind boggling. Even though they infinite money at their disposal it's still insane that they were a

The science behind building a proximity fuze in 1942 is just mind boggling. Even though they infinite money at their disposal it's still insane that they were able to computerize a shell moving with 16,000-20,000 G-Forces in the days of vacuum tubes.