My husband has always been very handy but lately he is forgetting a lot of small details. He unhooked the washing machine and left the water on. Then after me telling him he needed to hook the new washer up so it would quit leaking he forgot to hook up the drain hose. So the washer "exploded" water everywhere which caused the ceiling to leak. He constantly loses his keys, tools, etc. He has trouble remembering words (names of items) and gets very angry when he forgets. He is a Veteran (was deployed to Iraq, Afghanistan, etc.). Is this just normal aging or something I should be concerned about?