that lasts for seven years. 1972 – Astronauts John Young and Charles Duke fly Apollo 16's Apollo Lunar Module to the Moon's surface, the fifth NASA Apollo Program crewed lunar landing. 1975 – Vietnam War: President of South Vietnam Nguyễn Văn Thiệu flees Saigon, as Xuân Lộc, the last South Vietnamese outpost blocking a direct North Vietnamese assault on Saigon, falls. 1977 – Annie opens on Broadway. 1982 – Baseball: Rollie Fingers of the Milwaukee Brewers becomes the first pitcher to record 300 saves. 1985 – The compound of the militant group The Covenant, The Sword, and the Arm of the Lord surrenders to federal authorities in Arkansas after a two-day government siege. 1987 – The Tamil Tigers are blamed for a car bomb that detonates in the Sri Lankan capital city of Colombo, killing 106 people. 1989 – Tiananmen Square protests of 1989: In Beijing, around 100,000 students gather in Tiananmen Square to commemorate Chinese reform leader Hu Yaobang. 1993 – The Supreme Court in La Paz, Bolivia, sentences former dictator Luis García Meza to 30 years in jail without parole for murder, theft, fraud and violating the constitution. 2004 – Five suicide car bombers target police stations in and around Basra, killing 74 people and wounding 160. 2010 – The controversial Kharkiv Pact (Russian Ukrainian Naval Base for Gas Treaty) is signed in Kharkiv, Ukraine, by Ukrainian President Viktor Yanukovych and Russian President Dmitry Medvedev; it was unilaterally terminated by Russia on March 31, 2014. 2012 – Two trains are involved in a head-on collision near Sloterdijk, Amsterdam, in the Netherlands, injuring 116 people. 2014 – The American city of Flint, Michigan switches its water source to the Flint River, beginning the ongoing Flint water crisis which has caused lead poisoning in up to 12,000 people, and 15 deaths from Legionnaires disease, ultimately leading to criminal indictments against 15 people, five of whom have been charged with involuntary manslaughter. 2019 – Eight bombs explode at churches, hotels, and other locations in Sri Lanka on Easter Sunday; more than 250 people are killed. 2021 – Indonesian Navy submarine KRI Nanggala (402) sinks in the Bali Sea during a military drill, killing all 53 on board. Births Pre-1600 1132 – Sancho VI, king of Navarre (d. 1194) 1488 – Ulrich von Hutten, German religious reformer (d. 1523) 1523 – Marco Antonio Bragadin, Venetian lawyer and military officer (d. 1571) 1555