A second major stage of construction to upgrade the aging Newark Liberty International Airport in Newark, N.J., now is underway with owner Port Authority of New York and New Jersey's just announced plan to tear down and rebuild the facility's 51-year-old Terminal B.

The project is a key part of the airport's EWR Vision Plan which the agency unveiled on Oct. 17, developed with design firms Arup and Skidmore, Owings & Merrill.