Posters advertised low-cost flights to London and appeared in 82 places . Germanwings asked for them to be taken down after Tuesday 's crash . 150 people died when co-pilot forced plane to descend , prosecutors said .
Posters advertised low-cost flights to Germany and appeared in 82 places . Germanwings asked for them to be taken down after Tuesday 's crash . 150 people died when co-pilot forced plane to descend , prosecutors said .