This morning a Gulfstream V took off from Westchester County Airport, New York, and in so doing marked the 30th anniversary of the Corporate Angel Network (CAN), the business aviation charity that uses empty seats on business aircraft to fly cancer patients to treatment. On Dec. 22, 1981, the organization made its first flight, carrying a 16-year-old boy to his home in Detroit for Christmas after he received care in New York. Since then, CAN has flown nearly 40,000 cancer patients to treatment in vacant seats on corporate flights.