NASHVILLE, Tenn. (AP) -- A small, twin-engine plane carrying White House Chief of Staff Andrew Card made an emergency landing in Nashville Saturday after smoke began pouring into the cockpit, officials said. Card and 12 others on board were not injured when the Gulfstream 4 plane bound for Washington landed at the Nashville International Airport around 4 p.m., said Lynne Lowrance, an airport spokeswoman. "They thought they could be having some trouble with the Avionics instruments but they weren't sure what was causing the smoke," Lowrance said. The plane left Texas, where Card has been meeting with President Bush...