It's been a little over a year since actors John Travolta and Kelly Preston lost their 16-year-old son, Jett. Last week, the family's plane landed at Bangor International Airport in Maine. Someone who was not a family member was leash walking the couple's two small dogs when an airport service truck hit and killed the celebrity canines. The airport is investigating the accident. Although the Travoltas have not publicly commented on the loss of their pets, they did announce today that 47-year-old Preston is pregnant with their third child.