It's funny how your memory works...I am 61 now, and like many of us, I have a mild case of CRS Syndrome. But the events of April 10, 1963, are crystal clear.
My father spent his entire career with the Navy at the David Taylor Naval Ship Research and Development Center, which is across the Severn River from the US Naval Academy in Annapolis, Maryland. As a chemical engineer, he helped to design, install, and test the CO2 air scrubbers that enable nuclear submarines to stay submerged for extended periods. When I was little, he was constantly at sea, sailing out of New London, Norfolk, San Diego, or Pearl Harbor. Collectively, he spent about six months each year sailing on those early nuclear submarines...
My little brother was born on April 11, 1955. On the evening before his 8th birthday, April 10, 1963, my parents and I went out to shop for a gift for him. My grandmother was babysitting my brothers. (The youngest was just 2 years old.)
When we got home, my grandmother asked if we had heard the news. We had not. She told us that a US Navy submarine had sunk. The television show 'Going My Way' was on, and we watched it until an updated bulletin came on. When they announced that the submarine was the USS Thresher, Dad's face turned white, and he turned around, walked quickly out of the living room and up the stairs to the second floor of our home. We didn't see him the rest of the evening.
When he was in his 70s, we talked about the Thresher a bit. In addition to the ship's complement, there were other US Navy personnel on board (from the Portsmouth Naval Shipyard), and 17 civilian engineers. Dad knew a lot of them, having sailed with them at various times, and he told me that it was an engineer from Sperry Gyroscope in Brooklyn who went in his place that day.
There were two Sperry engineers on board the Thresher when she sank, and I've often wondered which of them was not supposed to be there...
There are several websites dedicated to the memory of the Thresher. This one has biographies for each crew member:
USS Thresher 593