“US Airways Group Inc., which has a hub in Philadelphia, said it cut 679 flights Sunday and planned to "precancel" 100 flights Monday.”
“Caldwell ID 219 precancel on 1972 National Parks set”
“In many cases, carriers try to precancel flights before a storm so their customers don't come to the airport and end up camping there.”
“Some precancel stamp collectors might contend that a certain 2 cent Liberty precancel from Phenix City, Alabama is the rarest U.S. stamp, since it was made solely at the Bureau of Engraving and Printing and there's only one.”
Looking for tweets for precancel.