Acute Myocardial Infarction: Classic heart attack. Complete blockage of coronary artery. Sudden onset of severe pain that feels "crushing" or "squeezing" that doesn't change with breathing. Treatment: High-flow Oxygen and rapid transport to hospital.
Ed White was the first American to perform a space walk. Ed wears a pressure suit because there is virtually no air pressure at 200 miles altitude. The astronaut must also have an oxygen supply for breathing. One method is for the astronaut to remain connected to the spacecraft through an "umbilical hose." This hose supplies the astronaut with oxygen. This is the method which Ed White used when he became the first American astronaut to make a space walk in 1965.Photo courtesy of NASA.
Splashdown. Apollo 13 was the seventh manned mission in the American space program and the third intended to land on the Moon. It was launched on April 11, 1970, from the Kennedy Space Center, Florida, but the lunar landing was aborted after an oxygen tank exploded two days later. Despite great hardship caused by limited power, loss of cabin heat, shortage of potable water, and the critical need to jury-rig the carbon dioxide removal system, the crew returned safely to Earth on April 17.