Airport officials say a walkout by ground staff at Berlin's two airports has forced 32 flights to be canceled and may continue to disrupt some traffic throughout the day, AP reported. The ver.di union called employees of three ground service companies to walk off their jobs between 4 a.m. (0200 GMT, 10 p.m. EDT Wednesday) and 10 a.m. (0800 GMT, 4 a.m. EDT) Thursday in an effort to revive stalled wage talks. -- SPA