In 1967, the Fifth Dimension asked the musical question, “Would you like to ride in my beautiful balloon?” The song, which was written by Jimmy Webb, was called Up, Up, & Away. Hot air ballooning began in 1783, with a sheep, a duck, and a rooster as the first passengers. The first human passengers took a ride two months later, on November 21st. While helium and hydrogen balloons were later used by the military, such as in World War I, according to the Aerostar company, which makes hot air balloons and equipment, little progress was made on the development of hot air balloons until the 1960s. Ballooning, as a sport and recreational activity, has been increasing in popularity since then, especially in the United States. There are now over 3,500 balloons in the US and about another 1,000 in other countries.