Simplify the following text for a Grade 12 native English-speaking person.
Original: The airport is operated by the Port Authority of New York and New Jersey , which also manages the two other major airports in the New York metropolitan area , Newark Liberty and LaGuardia Airport .
Simplified: The airport is run by the Port Authority of New York and New Jersey , which also runs the two other major airports in the New York area , Newark Liberty International Airport and LaGuardia Airport .