Terminal 2 (140,000 m2 (1,500,000 sq ft)), together with the SkyPlaza, opened on 28 February 2007 along with the opening of the Airport Station's Platform 3.[23] It is only a check-in and processing facility for departing passengers with no gates or arrival facilities (passengers are transported underground to gates at Terminal 1). So far most low-cost carriers and some full-service carriers have relocated their check-in operations to T2. The SkyPlaza is situated within Terminal 2. Architecture firm Aedas and Skidmore, Owings and Merrill designed Terminal 2 and the SkyPlaza.