Pierre-Francois Bouchard discovered the Rosetta Stone on 15 July 1799

Ya, your go

Which American city had it's name decided by the toss of a coin?

Bump from page 3

Portland, Oregon

Correct. Your go

In 1985, something called the Val di Stava collapsed. What was it?

The Val di Stava was a dam

It was, and it's your go

What was the first ever video to be shown on YouTube?

Double post

Me at the zoo, starring Jawed Karim at San Diego Zoo.

Correct. Your go

Who led the July 20 plot against the life of German leader Adolf Hitler?

No-one?

Colonel Henning von Tresckow lead the plot to assassinate Adolf Hitler

It was? Hmm, not the answer I have... Show me your source and I'll see when I come back

General Friedrich Olbricht, Major General Henning von Tresckow, and Colonel Claus von Stauffenberg

The original plan, designed to deal with internal disturbances in emergency situations, was designed by General Friedrich Olbricht's staff

i think Olbricht might be the answer you want.... maybe?

Von Stauffenberg is the answer I was looking for, and even though von Tresckow was a prime mover in plots to kill Hitler, the particular July 20 one didn't so much involve him as he was out on the Eastern Front, so I'm gonna have to stick with von Stauffenberg. Which means it's... Zante's go?

http://en.wikipedia.org/wiki/20_July_plot