The American calendar is full of opportunities to express your patriotism and/or buy a mattress: Flag Day, Lee-Jackson Day, Patriot’s Day, Purple Heart Day, Constitution Day and Citizenship Day (part of Constitution Week), National POW/MIA Recognition Day, Gold Star Mother’s Day, Pearl Harbor Remembrance Day, Bill of Rights Day Veterans Day, Memorial Day . . . but the granddaddy of them all is Independence Day. Our forebears risked life and limb to fight for our freedoms; on Independence Day we risk life and limb to shoot explosives into the air to make pretty night-flowers. We celebrate in time-honored ways: going to the lake, grilling out, beer drinking, lawnmower races. . .