Defense officials are weighing a proposal from the director of the Army and Air Force Exchange Service (AAFES) to allow the nation’s 22 million honorably discharged veterans, and perhaps an equal number of their family members, to shop online for military exchange products and discounts. Shoppers who use the AAFES website enjoy savings of up to 25 percent on many brand name products. They also avoid state and local sale taxes on their purchases just like on-base shoppers do. By providing online discounts to millions of deserving veterans and families, said Thomas C. Shull, chief executive officer of AAFES, the...