Full construction is at last underway for the Walnut Street Apple Store in downtown Philadelphia, a report notes. Despite the size of the city, residents have so far had to drive as far away as Ardmore or Cherry Hill to shop at a first-party store, which can be particularly important during major product launches. The Walnut Street outlet should address that problem, but until now development has been hampered by the need to carefully remove asbestos from a building dating back to the 1900s.