A Malaysian national and a Filipino were killed Tuesday when a helicopter crashed in a vacant lot about two hours southeast of Manila.The Bell 505 helicopter carrying five people, including two Malaysians, took off from the capital and was en route to Quezon province, more than 400km (248 miles) southeast of the capital, the Civil Aviation Authority of the Philippines and other officials said.It was not immediately clear what caused the forced landing in clear weather in a grassy area of about...