While some businesses scale back their hours or close entirely for the federal holiday, a number of major chains will keep their doors open. WASHINGTON — Monday marks Memorial Dayhonoring fallen service members in the U.S. The federal holiday honors men and women who died while serving in the U.S. military. While it is a somber day for many who have lost loved ones, communities often mark the day with ceremonies or parades and it is considered the “unofficial start to summer.” In observance of the holiday, schools, banks, government offices and other services nationwide will close. While many stores…