1703: Robert Hooke, who developed Hooke's Law for springs, died. 1847: Alexander Graham Bell, inventor of the telephone, was born. 1851: The U.S. Congress authorized the 3¢ piece - it was the smallest U.S. silver coin, and reduced the rate of a 1st-class stamp from 5¢ to 3¢. 1863: Congress authorized a track width of 4-ft 8-1/2-in as the standard for the Union Pacific Railroad. 1885: The American Telephone and Telegraph (AT&T) was incorporated in New York as a subsidiary of the American Bell Telephone Company. 1901: Congress created National Bureau of Standards (NIST as of 1988).  1919: The first U.S. international airmail service began. 1923: The first edition of Time magazine was published. 1931: "The Star-Spangled Banner" was designated the national anthem of the U.S. 1972: The unmanned U.S. space probe Pioneer 10 was launched, and on June 13, 1983, the spacecraft became the first man-made object to leave the solar system. 2005: Steve Fossett completed the first solo non-stop flight around the world without refueling in the GlobalFlyer.