and la guardia, even though nearby newark airport will not. masks will also be required on new york subway system as well as other mass transit systems that impose their own rulings. this was not an orderly shift. this is not the way you move public policy. reporter: the sweeping new changes come during a spring break travel surge. the latest tsa numbers say more than 11 million people flew nationwide over the long easter weekend, with what could be a huge summer travel season on the horizon, the cdc remains firm on its guidance, telling travelers to continue to wear masks, even in the absence of a federal mandate. just because this ruling was made by a judge doesn t mean that suddenly the science has changed. reporter: in her decision, u.s. district judge katherine kimball mazel likened it to quarantine. the airlines that previously banned thousands of passengers for violating mask rules are now letting them decide for