[Mopp4]

How did he know it was live ?

[null and void]

I don't know about you, but if I opened a shipping container and saw it, I'd assume it was live and call in those more skilled in the art to verify.

Unless it was painted blue, then I'd still call in those more qualified to verify it's a dummy.

[Steve_Seattle]

"How did he know it was live?"

The crate said "Acme Live Bomb."

[al baby]

tic toc sound

[Tonytitan]

How did he know it was live ?

"Live" is an irrelevant term here. "Armed" is more to the point. And it isn't armed until the fighter aircraft hauling it around arms it.