DENVER — Frontier Airlines pilots picketed in downtown Denver Thursday in a bid for public support in their long running fight with the Denver-based discount carrier to replace their bankruptcy contract. About 350 uniformed pilots, including a handful from other airlines, and flight attendants silently walked up and down the sidewalk in frigid weather across the street from Denver’s city hall near the state Capitol. Union rules bar them from chanting but they held signs showing wild animals like the ones displayed on the tails of the airline’s aircraft including one with a bear that said “Frontier Pilots: Flying Under an Unbearable Contract.” The demonstration drew some honks and shouts of support from passing cars and pedestrians while others just looked as they walked by. Tatiana Flowers, The Associated PressAbout 350 pilots, including a handful from other airlines, stage an informational picket outside Denver’s city hall in Denver, Colo.,Thursday, Dec.