Suspects Began Screaming, Rolling In AisleWhat, exactly, happened onboard a recent Northwest Airlines flight from Minneapolis to Boston? That's the question federal investigators are now contemplating, while a former police officer is being called a hero for his role in subduing two passengers. Boston's WBZ-TV reports Bob Hayden, a retired 28-year veteran police officer and former Lawrence, MA police chief, was a passenger on Northwest Flight 720 this weekend. Hayden says that even before the plane took off, one man started to act strangely -- pacing up and down the aisle, apparently aggravated. A flight attendant forced the man into...