First Lady Michelle Obama arrived in Aspen on Friday afternoon and is here with her daughters for a ski vacation. Few details about her trip were available. Sources said she is staying at the home of Jim and Paula Crown, owners of the Aspen Skiing Co. She is reportedly skiing at Buttermilk today, where the Crowns, of Chicago, own a home on the Tiehack side. Several people have known about the “low-key” vacation, with the Secret Service in town for the past few days scoping out places for the family to relax and enjoy what the resort has to offer....