UPI Almanac for Tuesday, April 13, 2021 On April 13, 1970, an oxygen tank exploded aboard Apollo 13 en route to a planned moon landing and one of the three astronauts aboard, Jack Swigert, the command module pilot, famously said, "Houston, we've had a problem." By (0) Crewmembers of the Apollo 13 mission step aboard the USS Iwo Jima. On April 13, 1970, an oxygen tank exploded aboard Apollo 13 en route to a planned moon landing. File Photo courtesy of NASA Music producer Phil Spector arrives at Los Angeles Superior Court for opening statements in his murder trial in Los Angeles on April 25, 2007. On April 13, 2009, Spector was found guilty of second-degree murder by a Los Angeles jury in his second trial for the 2003 slaying of Lana Clarkson. File Photo by Jim Ruymen/UPI | License Photo