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On May 5, 1961, Alan Shepard became the first American to enter space. This NASA film chronicles Shepard's short flight into space.

President Kennedy talks about the U.S. space program, arguing that America should be the leader in space exploration and the first to land a man on the moon before the end of the decade.

This NASA film details the February 20, 1962, Mercury Friendship 7 mission when John Glenn became the first U.S. astronaut to orbit the earth.

This NASA film documents the June 1965 manned space flight by James McDivitt and Edward White. The mission included the first American spacewalk.

This NASA film documents the sixth manned Gemini mission in 1966, which was the first to dock with another craft in space. An emergency required the astronauts to cut short the mission.

Jim Lovell and Buzz Aldrin flew the final Gemini mission before the Apollo program's first mission. This NASA film shows what they did on their mission including docking maneuvers and space walks.

This film documents NASA's 1968 manned mission to orbit the Moon.

This 1968 film chronicles the major accomplishments of NASA since it was established by Congress in 1958.

This 1969 NASA documentary detailed the first NASA mission to land two men on the moon.

On April 11, 1970, Apollo 13 blasted off on what was to be the third NASA mission to land humans on the moon, but a crisis nearly left the three astronauts stranded in space.

In December of 1972, Eugene Cernan and Harrison Schmitt became the last men to walk on the Moon. This NASA film shows how the Apollo program closed out its Moon missions.

This NASA film looks back at the Apollo spaceflight program (1961-72) and its achievements, including landing men on the Moon.

Gov. Josh Shapiro (D-PA) reflects on what he has learned from his years in politics and argues that there is more that unites Americans than divides them.

Kori Schake, director of foreign and defense policy studies at the American Enterprise Institute, examines the relationship between civilian and military leadership in America going back to the country's founding.

ABC News chief Washington correspondent Jonathan Karl discusses his book Retribution: Donald Trump and the Campaign That Changed America and talks about his decades-long relationship with President Trump..

Pulitzer Prize-winning writer Rick Atkinson - author of trilogies on World War II and the American Revolution - gives a tour of his home office and talks about his research process.

Jeffrey Kluger chronicles NASA's Gemini program. Mr. Kluger examines how, over 12 missions, the program enabled the United States to land men on the Moon in 1969.

Gov. Josh Shapiro (D-PA) reflects on what he has learned from his years in politics and argues that there is more that unites Americans than divides them.

Cardiologist Marshall Runge argues that artificial intelligence and other new technologies can help improve American healthcare. The Harvard Bookstore in Cambridge, MA, hosts this event.

Former FBI investigator Tim Carpenter recounts the true-life detective story spearheaded by the Bureau's Art Crime Team, which found itself on the trail of a thief who stole thousands of cultural artifacts -- and human remains -- from around the wor.

Authors Charlene Mires and Howard Gillette discuss Philadelphia's role in shaping the nation.

Chapman University's Mark Skousen leads a discussion on the work and influence of University of Chicago economics professor Milton Friedman, who was awarded the Nobel Prize in Economics in 1976.

Bestselling author Christopher Buckley joins David M. Rubenstein to discuss the art of writing satire, his upbringing, and the life of his father William F. Buckley.

Bestselling author Christopher Buckley and David M. Rubenstein tour the historic Decatur House and view historic political cartoons.

Gov. Josh Shapiro (D-PA) reflects on what he has learned from his years in politics and argues that there is more that unites Americans than divides them.

Kori Schake, director of foreign and defense policy studies at the American Enterprise Institute, examines the relationship between civilian and military leadership in America going back to the country's founding.

ABC News chief Washington correspondent Jonathan Karl discusses his book Retribution: Donald Trump and the Campaign That Changed America and talks about his decades-long relationship with President Trump..

Pulitzer Prize-winning writer Rick Atkinson - author of trilogies on World War II and the American Revolution - gives a tour of his home office and talks about his research process.

Jeffrey Kluger chronicles NASA's Gemini program. Mr. Kluger examines how, over 12 missions, the program enabled the United States to land men on the Moon in 1969.

Gov. Josh Shapiro (D-PA) reflects on what he has learned from his years in politics and argues that there is more that unites Americans than divides them.