U.S. President Harry S. Truman publicly announces his decision to support the development of the hydrogen bomb, a weapon theorized to be hundreds of times more powerful than the atomic bombs dropped on Japan during World War II.

Five months earlier, the United States had lost its nuclear supremacy when the Soviet Union successfully detonated an atomic bomb at their test site in Kazakhstan. Then, several weeks after that, British and U.S. intelligence came to the staggering conclusion that German-born Klaus Fuchs, a top-ranking scientist in the U.S. nuclear program, was a spy for the Soviet Union. These two events, and the fact that the Soviets now knew everything that the Americans did about how to build a hydrogen bomb, led Truman to approve massive funding for the superpower race to complete the world’s first “superbomb,” as he described it in his public announcement on January 31.

On November 1, 1952, the United States successfully detonated “Mike,” the world’s first hydrogen bomb, on the Eniwetok Atoll in the Pacific Marshall Islands. The 10.4-megaton thermonuclear device, built upon the Teller-Ulam principles of staged radiation implosion, instantly vaporized an entire island and left behind a crater more than a mile wide. The incredible explosive force of Mike was also apparent from the sheer magnitude of its mushroom cloud–within 90 seconds the mushroom cloud climbed to 57,000 feet and entered the stratosphere. One minute later, it reached 108,000 feet, eventually stabilizing at a ceiling of 120,000 feet. Half an hour after the test, the mushroom stretched 60 miles across, with the base of the head joining the stem at 45,000 feet.

Three years later, on November 22, 1955, the Soviet Union detonated its first hydrogen bomb on the same principle of radiation implosion. Both superpowers were now in possession of the “hell bomb,” as it was known by many Americans, and the world lived under the threat of thermonuclear war for the first time in history.

Source: https://www.history.com/this-day-in-history/truman-announces-development-of-h-bomb

On January 29, 1936, the U.S. Baseball Hall of Fame elects its first members in Cooperstown, New York: Ty Cobb, Babe Ruth, Honus Wagner, Christy Matthewson and Walter Johnson.

The Hall of Fame actually had its beginnings in 1935, when plans were made to build a museum devoted to baseball and its 100-year history. A private organization based in Cooperstown called the Clark Foundation thought that establishing the Baseball Hall of Fame in their city would help to reinvigorate the area’s Depression-ravaged economy by attracting tourists. To help sell the idea, the foundation advanced the idea that U.S. Civil War hero Abner Doubleday invented baseball in Cooperstown. The story proved to be phony, but baseball officials, eager to capitalize on the marketing and publicity potential of a museum to honor the game’s greats, gave their support to the project anyway.

In preparation for the dedication of the Hall of Fame in 1939—thought by many to be the centennial of baseball—the Baseball Writers’ Association of America chose the five greatest superstars of the game as the first class to be inducted: Ty Cobb was the most productive hitter in history; Babe Ruth was both an ace pitcher and the greatest home-run hitter to play the game; Honus Wagner was a versatile star shortstop and batting champion; Christy Matthewson had more wins than any pitcher in National League history; and Walter Johnson was considered one of the most powerful pitchers to ever have taken the mound.

Today, with approximately 350,000 visitors per year, the Hall of Fame continues to be the hub of all things baseball. 

Source: https://www.history.com/this-day-in-history/u-s-baseball-hall-of-fame-elects-first-members

At 11:38 a.m. EST, on January 28, 1986, the space shuttle Challenger lifts off from Cape Canaveral, Florida, and Christa McAuliffe is on her way to becoming the first ordinary U.S. civilian to travel into space. McAuliffe, a 37-year-old high school social studies teacher from New Hampshire, won a competition that earned her a place among the seven-member crew of the Challenger. She underwent months of shuttle training but then, beginning January 23, was forced to wait six long days as the Challenger‘s launch countdown was repeatedly delayed because of weather and technical problems. Finally, on January 28, the shuttle lifted off.

Seventy-three seconds later, hundreds on the ground, including Christa’s family, stared in disbelief as the shuttle broke up in a forking plume of smoke and fire. Millions more watched the wrenching tragedy unfold on live television. There were no survivors.

In 1976, the National Aeronautics and Space Administration (NASA) unveiled the world’s first reusable manned spacecraft, the Enterprise. Five years later, space flights of the shuttle began when Columbia traveled into space on a 54-hour mission. Launched by two solid-rocket boosters and an external tank, only the aircraft-like shuttle entered into orbit around Earth. When the mission was completed, the shuttle fired engines to reduce speed and, after descending through the atmosphere, landed like a glider. Early shuttles took satellite equipment into space and carried out various scientific experiments. The Challenger disaster was the first major shuttle accident.

In the aftermath of the disaster, President Ronald Reagan appointed a special commission to determine what went wrong with Challenger and to develop future corrective measures. The presidential commission was headed by former secretary of state William Rogers, and included former astronaut Neil Armstrong and former test pilot Chuck Yeager. The investigation determined that the disaster was caused by the failure of an “O-ring” seal in one of the two solid-fuel rockets. The elastic O-ring did not respond as expected because of the cold temperature at launch time, which began a chain of events that resulted in the massive loss. As a result, NASA did not send astronauts into space for more than two years as it redesigned a number of features of the space shuttle.

In September 1988, space shuttle flights resumed with the successful launching of the Discovery. Since then, the space shuttle has carried out numerous important missions, such as the repair and maintenance of the Hubble Space Telescope and the construction of the International Space Station.

On February 1, 2003, a second space-shuttle disaster rocked the United States when Columbia disintegrated upon reentry of the Earth’s atmosphere. All aboard were killed. Despite fears that the problems that downed Columbia had not been satisfactorily addressed, space-shuttle flights resumed on July 26, 2005, when Discovery was again put into orbit.

The Space Shuttle program formally ended on August 31, 2011 after its final mission, STS-135 flown by Atlantis, in July 2011.