Bomb threat email text ...

Good day. I write you to inform you that my mercenary has carried the bomb (tronitrotoluene) into the building where your company is conducted. It is assembled according to my instructions. It can be hidden anywhere because of its small size, it is impossible to destroy the structure of the building by this bomb, but you will get many victims if it explodes.
My mercenary is controlling the situation around the building. If he notices any unnatural behavior or emergency the bomb will be exploded.
I can withdraw my mercenary if you pay. You pay me 20'000 usd in BTC and the bomb will not explode, but don't try to deceive me -I guarantee you that I have to withdraw my recruited person solely after 3 confirmations in blockchain network.

My payment details (btc address)- 1PqX7bMnCzpJ7L1mxuGgNyaJSkJRM8SjES

You have to pay me by the end of the workday. If the workday is over and people start leaving the building the device will explode.
Nothing personal, if you don’t transfer me the bitcoins and an explosive device detonates, next time other commercial enterprises will transfer me a lot more, because it isnt a one-time action.
For security and anonymity reasons, I wont visit this email account. I check my Bitcoin wallet every 25 minutes and if I see the transaction I will order my recruited person to leave your area.

If a bomb explodes and the authorities see this letter-
We arent the terrorist organization and dont take any liability for acts of terrorism in other places.