Remember flying with liquids, tweezers and no ID? Just as post 9/11 security has become part of modern life, so are COVID work accommodations here to stay. That doesn’t have to hurt. For businesses that accept reality, productivity will increase. — In the weeks after the Twin Towers fell, corporate America wrung its hands. Markets were open and planes were flying, but less frequently and emptier. How much would the precipitous decline in business travel and similar practices hurt output?