Fireworks, which are generally believed to have been invented by the Chinese, have been used throughout history to celebrate happy occasions. In 1789, George Washington's inauguration was accompanied by a display, and today, fireworks help mark Independence Day in the US, Diwali in India, and New Year's Eve around the world. In 2004, Disneyland began launching(打ち上げる)fireworks with compressed air(圧縮空気)rather than black powder. The advantages of compressed air launch are a reduction in fumes, and much greater accuracy in height and timing.