What is april 7 1972?

On April 7, 1972, several significant events occurred:

1. The US and Soviet Union signed an agreement that restricted the number of underground nuclear tests each country could conduct.

2. The Apollo 16 mission was launched, with astronauts John W. Young and Charles M. Duke Jr. becoming the ninth and tenth people to walk on the moon.

3. An earthquake measuring 7.5 on the Richter scale struck the city of Managua, Nicaragua, killing approximately 10,000 people and causing widespread damage.

4. French philosopher and author Jean-Paul Sartre passed away at the age of 72.

5. American singer-songwriter and musician Laura Nyro released her sixth studio album, "Gonna Take a Miracle."