You can find the answer on this website http://www.history.com/topics/us-presidents/george-washington
I'm going to assume the image has a gas mask, because there's no kind of equipment that protects from diseases, flamethrowers, or machine-guns.
The answer is poisonous gas.
- to resolve trade disputes
- to promote fair and successful trade
- to encourage trade in developing countries
Hey there hope this answer will help you!
Einstein wrote to Roosevelt for the action on nuclear research.(Multiple times)