President Obama brought along a second, smaller Air Force One for his family to enjoy a day of sightseeing in Argentina on Thursday. After dancing the tango at a state dinner in Buenos Aires Wednesday night, the president and first lady Michelle Obama took their daughters aboard the government plane colloquially known as “baby” Air Force One Thursday to fly to the scenic town of Bariloche in southern Argentina. It’s a Boeing 757 used when traveling to places where the runway is too short for the primary Air Force One. The larger Air Force One, a 747-200, was parked alongside...