#onthisday April 17, 1970, the world anxiously watched as Apollo 13, a U.S. lunar spacecraft that suffered a severe malfunction on its journey to the moon, made its way safely back to Earth. On April 11, the third manned lunar landing mission was launched, however two days into the mission disaster struck 200,000 miles from Earth when an oxygen tank blew up. Astronaut John L. Swigert reported to mission control, “Houston, we have a problem." The landing mission was aborted and a challenging and terrifying journey home began but tragedy turned into triumph when Apollo 13 safely landed into the Pacific Ocean. Discover how astronauts have persevered in the face of extraordinary challenges—and be inspired.