Traveller's cheques and credit cards (American Express, Visa, Mastercard) are exchanged for Vietnamese dong at the banks. Cards can be used in travel agencies, hotels, and major restaurants. US currency is exchanged for Vietnamese dong and treasury notes in banks, exchange bureaus, hotels, and jewellery shops.
Nikola Tesla designed the first hydroelectric power plant at Niagara Falls, New York which started producing electrical power in 1895. This was the beginning of the electrification of the United States and the rest of the world. Today, Teslaâs AC electricity is lighting and powering the globe.
After the World's Fair, his company was granted a contract to build three hydroelectric power plants at Niagara Falls, New York. After opening in 1895 these plants soon supplied power to Buffalo, a city some twenty miles away a distance that would have been nearly impossible for DC transmission.