1945 President Truman is briefed on Manhattan Project President Harry Truman learns the full details of the Manhattan Project, in which scientists are attempting to create the first atomic bomb, on this day in 1945. The information thrust upon Truman a momentous decision: whether or not to use the world’s first weapon of mass destruction. America’s secret development of the atomic bomb began in 1939 with then-President Franklin Roosevelt’s support. The project was so secret that FDR did not even inform his fourth-term vice president, Truman, that it existed. (In fact, when Truman’s 1943 senatorial investigations into war-production expenditures led him to ask questions about a suspicious plant in Minneapolis, which was secretly connected with the Manhattan Project, Truman received a stern phone call from FDR’s secretary of war, Harry Stimson, warning him not to inquire further.) When President Roosevelt died on April 12, 1945, Truman was immediately sworn in and, soon after, was informed by Stimson of a new and terrible weapon being developed by physicists in New Mexico. In his diary that night, Truman noted that he had been informed that the U.S. was perfecting an explosive great enough to destroy the whole world. On April 24, Stimson and the army general in charge of the project, Leslie Groves, brought Truman a file full of reports and details on the Manhattan Project. They told Truman that although the U.S. was the only country with the resources to develop the bomb–eliminating fears that Germany was close to developing the weapon–the Russians could possibly have atomic weapons within four years. They discussed if, and with which allies, they should share the information and how the new weapon would affect U.S. foreign-policy decisions. Truman authorized the continuation of the project and agreed to form an interim committee that would advise the president on using the weapon. Although the war in Europe ended in May 1945, Stimson advised Truman that the bomb might be useful in intimidating Soviet leader Joseph Stalin into curtailing post-war communist expansion into Eastern Europe. Truman agreed and said that if the weapon proved feasible I’ll certainly have a hammer on those [Russians]. Meanwhile the war with Japan dragged on and it looked to many as if the Japanese would never surrender. On July 16, the team of scientists at the Alamogordo, New Mexico, research station successfully exploded the first atomic bomb. Truman gave Stimson the handwritten order to release when ready but not sooner than August 2 on July 31, 1945. The first bomb was exploded over Hiroshima on August 6, 1945, and a second was dropped on Nagasaki on August 8. The Japanese quickly surrendered. Although other nations have developed atomic weapons and nuclear technology since 1945, Truman remains the only world leader to have ever used an atomic bomb against an enemy. Easter Rebellion begins On this day in 1916, on Easter Monday in Dublin, the Irish Republican Brotherhood, a secret organization of Irish nationalists led by Patrick Pearse, launches the so-called Easter Rebellion, an armed uprising against British rule. Assisted by militant Irish socialists under James Connolly, Pearse and his fellow Republicans rioted and attacked British provincial government headquarters across Dublin and seized the Irish capital’s General Post Office. Following these successes, they proclaimed the independence of Ireland, which had been under the repressive thumb of the United Kingdom for centuries, and by the next morning were in control of much of the city. Later that day, however, British authorities launched a counteroffensive, and by April 29 the uprising had been crushed. Nevertheless, the Easter Rebellion is considered a significant marker on the road to establishing an independent Irish republic. Following the uprising, Pearse and 14 other nationalist leaders were executed for their participation and held up as martyrs by many in Ireland. There was little love lost among most Irish people for the British, who had enacted a series of harsh anti-Catholic restrictions, the Penal Laws, in the 18th century, and then let 1.5 million Irish starve during the Potato Famine of 1845-1852. Armed protest continued after the Easter Rebellion and in 1921, 26 of Ireland’s 32 counties won independence with the declaration of the Irish Free State. The Free State became an independent republic in 1949. However, six northeastern counties of the Emerald Isle remained part of the United Kingdom, prompting some nationalists to reorganize themselves into the Irish Republican Army (IRA) to continue their struggle for full Irish independence. In the late 1960s, influenced in part by the U.S. civil rights movement, Catholics in Northern Ireland, long discriminated against by British policies that favored Irish Protestants, advocated for justice. Civil unrest broke out between Catholics and Protestants in the region and the violence escalated as the pro-Catholic IRA battled British troops. An ongoing series of terrorist bombings and attacks ensued in a drawn-out conflict that came to be known as “The Troubles.” Peace talks eventually took place throughout the mid- to late 1990s, but a permanent end to the violence remained elusive. Finally, in July 2005, the IRA announced its members would give up all their weapons and pursue the group’s objectives solely through peaceful means. By the fall of 2006, the Independent Monitoring Commission reported that the IRA’s military campaign to end British rule was over. 1800 Library of Congress established President John Adams approves legislation to appropriate $5,000 to purchase “such books as may be necessary for the use of Congress,” thus establishing the Library of Congress. The first books, ordered from London, arrived in 1801 and were stored in the U.S. Capitol, the library’s first home. The first library catalog, dated April 1802, listed 964 volumes and nine maps. Twelve years later, the British army invaded the city of Washington and burned the Capitol, including the then 3,000-volume Library of Congress. Former president Thomas Jefferson, who advocated the expansion of the library during his two terms in office, responded to the loss by selling his personal library, the largest and finest in the country, to Congress to “recommence” the library. The purchase of Jefferson’s 6,487 volumes was approved in the next year, and a professional librarian, George Watterston, was hired to replace the House clerks in the administration of the library. In 1851, a second major fire at the library destroyed about two-thirds of its 55,000 volumes, including two-thirds of the Thomas Jefferson library. Congress responded quickly and generously to the disaster, and within a few years a majority of the lost books were replaced. After the Civil War, the collection was greatly expanded, and by the 20th century the Library of Congress had become the de facto national library of the United States and one of the largest in the world. Today, the collection, housed in three enormous buildings in Washington, contains more than 17 million books, as well as millions of maps, manuscripts, photographs, films, audio and video recordings, prints, and drawings.