Today on April 4 1541 Ignatius of Loyola became the first superior-general of the Jesuits. 1581 Francis Drake completed the circumnavigation of the world. 1687 King James II ordered that his declaration of indulgence be read in church. 1850 The city of Los Angeles was incorporated. 1902 British Financier Cecil Rhodes left $10 million in his will that would provide scholarships for Americans to Oxford University in England. 1905 In Kangra, India, an earthquake killed 370,000 people. 1914 The first known serialized moving picture opened in New York City, NY. It was "The Perils of Pauline". 1917 The U.S. Senate voted 90-6 to enter World War I on the Allied side. 1918 The Battle of Somme, an offensive by the British against the German Army ended. 1932 After five years of research, professor C.G. King, of the University of Pittsburgh, isolated vitamin C. 1945 Hungary was liberated from Nazi occupation. 1945 During World War II, U.S. forces liberated the Nazi death camp Ohrdruf in Germany. 1949 Twelve nations signed a treaty to create The North Atlantic Treaty Organization (NATO). 1967 The U.S. lost its 500th plane over Vietnam. 1967 Johnny Carson quit "The Tonight Show." He returned three weeks later after getting a raise of $30,000 a week. 1968 Martin Luther King Jr. was assassinated at the age of 39. 1969 Dr. Denton Cooley implanted the first temporary artificial heart. 1971 Veterans stadium in Philadelphia, PA, was dedicated this day. 1975 More than 130 people, most of them children, were killed when a U.S. Air Force transport plane evacuating Vietnamese orphans crashed just after takeoff from Saigon. 1979 Zulfikar Ali Bhutto, the president of Pakistan, was executed. He had been convicted of conspiring to murder a political opponent. 1981 Henry Cisneros became the first Mexican-American elected mayor of a major U.S. city, which was San Antonio, TX. 1983 At Cape Canaveral, the space shuttle Challenger took off on its first flight. It was the sixth flight for the shuttle program. 1984 U.S. President Reagan proposed an international ban on chemical weapons. 1986 Wayne Gretzky set an NHL record with his 213th point of the season. 1987 The U.S. charged the Soviet Union with wiretapping a U.S. Embassy. 1988 Arizona Governor Evan Mecham was voted out of office by the Arizona Senate. Mecham was found guilty of diverting state funds to his auto business and of trying to impede an investigation into a death threat to a grand jury witness. 1991 Pennsylvanian Senator John Heinz and six others were killed when a helicopter collided with Heinz's plane over a schoolyard in Merion, PA. 1994 Netscape Communications (Mosaic Communications) was founded. 1995 U.S. Senator Alfonse D'Amato ridiculed judge Lance Ito using a mock Japanese accent on a nationally syndicated radio program. D'Amato apologized two days later for the act. 2016 Do smiled.