The Invasion of Normandy was the invasion by and establishment of Western Allied forces in Normandy, during Operation Overlord in 1944 during World War II; the largest amphibious invasion to ever take place. D-Day, the day of the initial assaults, was Tuesday 6 June 1944.
The child may receive Social Security, but at 18, the benefits usually end. If someone dies after a lifetime of paying into Social Security, that doesn't mean her taxes go to waste. Her family, including children, a surviving spouse and dependent parents, can receive benefits based on the deceased's earnings.
Your spouse would receive these benefits until the child reaches age 16. At that time, the child's benefits continue, but your spouse's benefits stop unless he or she is old enough to receive retirement benefits (age 62 or older) or survivor benefits as a widow or widower (age 60).