INTERVIEW: TMC Exec Marc Casto

More than 60 of Casto Travel's 300 accounts this summer enrolled in a new concierge program in which select travelers pay more for heretofore ancillary services. Calling them "valuable amenities normally associated with a personal assistant," the travel management company listed examples including restaurant, golf and other leisure or family arrangements, complimentary air and hotel upgrades, airport meeting room bookings and loyalty program reward processing. From the sounds of it, president an