Senator John Heinz of Pennsylvania and six others are killed when a helicopter collides with their airplane over an elementary school in Merion, Pennsylvania. Date: April 4, 1991 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1991 📅 On This Day (Today)

Three people are killed when KLM Cityhopper Flight 433 crashes at Amsterdam Airport Schiphol. Date: April 4, 1994 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1994 📅 On This Day (Today)

Comet Hyakutake is imaged by the USA Asteroid Orbiter Near Earth Asteroid Rendezvous. Date: April 4, 1996 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1996 📅 On This Day (Today)

Space Shuttle program: Space Shuttle Columbia is launched on STS-83. However, the mission is later cut short due to a fuel cell problem. Date: April 4, 1997 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1997 📅 On This Day (Today)

The MPLA government of Angola and UNITA rebels sign a peace treaty ending the Angolan Civil War. Date: April 4, 2002 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 2002 📅 On This Day (Today)

France announces its return to full participation of its military forces within NATO. Date: April 4, 2009 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 2009 📅 On This Day (Today)

A magnitude 7.2 earthquake hits south of the Mexico-USA border, killing at least two and damaging buildings across the two countries. Date: April 4, 2010 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 2010 📅 On This Day (Today)

Georgian Airways Flight 834 crashes at N'djili Airport in Kinshasa, killing 32. Date: April 4, 2011 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 2011 📅 On This Day (Today)