We're thinking of something that is terrifying, powerful, incredible, and awe-inspiring, all at the same time. It was a game-changer in a seriously mind-blowing way, and debates about the ethics and morality of its use have gone on for several decades and will likely continue for at least several more. It's big, it's bad, and it was born in the high desert of New Mexico.

Can you guess what it is?

If you guessed "atomic weapons," you'd be right.

If you guessed "World Shovel Race Championship," you'd be wrong.

Anyway, here's a chance to hear from the lead dude responsible for the H-bomb's creation, just a few short months after the United States dropped Little Boy and Fat Man on Hiroshima and Nagasaki and gave a whole new meaning to the concept of leveling a city.

FDR strongly approved of and encouraged Oppenheimer's work, and it was President Truman who authorized using said work, but "Oppie" (as he was known to friends) is often the man considered responsible for the devastation his weaponry brought to Japan.

This speech is part explanation and part pontification, and it shows a very human side to the guy many regard as World War II's mad scientist extraordinaire.

It also provides a nice before-and-after contrast with FDR's Pearl Harbor speech. In FDR's speech, it's all, "Now we're mad and we're gonna fight back." And in this speech, it's all, "We got mad, we fought back, and now we need to reflect on our actions and let them guide our future."

Deep stuff…and totally worth a read.