Snowstorms cause 100's of flights to be cancelled or delayed

Major snowstorms have caused disruption to large parts of the East Coast of the U.S. today. Many hundreds of flights have been delayed and / or canceled at airports across the region, including Philadelphia International Airport, Baltimore-Washington International, Washington Dulles International Airport, Boston's Logan international Airport and in the New York area, John F. Kennedy International Airport, LaGuardia Airport and Newark Liberty International Airport