For decades, the stereotypical business trip had a familiar rhythm. Fly out, spend a couple of nights in a hotel, squeeze meetings into a packed schedule, and get home before the end of the week. That model certainly has not disappeared, but the forces reshaping office life are also changing what companies expect from a trip.

For decades, supersonic passenger travel has occupied an odd place between aviation history and science fiction. Concorde proved that an airliner could cross the Atlantic in less than four hours, but the aircraft disappeared from commercial service in 2003 after years of high operating costs, expensive fares, and a limited market. Now, a combination of new aircraft development, successful supersonic test flights, and changing U.S. regulations has made the possibility of high-speed commercial travel harder to dismiss. For business travelers, the biggest potential change is straightforward: journeys that consume most of a day could eventually consume only a few hours.

Cities rarely stay frozen in time. Industries collapse, transportation changes, neighborhoods decline, and sometimes an economic crisis forces leaders to rethink what a city is supposed to be. From former factory towns to polluted ports, these cities found very different ways to build a new identity.