This is the story of the Dayton-Chicago flight:
Dow Jones: Japanese Man Arrested After English Lesson Misinterpreted
CHICAGO (AP) A Japanese man flying to Ohio was arrested after he was seen writing down the words "suicide bomb," but he was released without charge after explaining that it was an impromptu English exercise.
The 60-year-old man told investigators he came across the words in a newspaper and wanted to look up their meaning, police spokeswoman Alice Casanova said.
"He teaches himself English by reading newspapers," she said. "It was all just a miscommunication."
The man was aboard United Airlines flight 1184 en route to Dayton, Ohio, on a business trip Sunday when a fellow passenger spotted the words and alerted an attendant, Casanova said.
The flight returned to O'Hare International Airport, where the man was taken into custody and all of the other 120 passengers were taken off the plane and re-screened.
Investigators also searched the plane. "Nothing panned out and he was released," Casanova said.
Transportation Security Administration spokeswoman Andrea McCauley said travellers need to be mindful of how they behave on aircraft because potential security threats are treated very seriously.
"We caution people not to write about bombs because if they're going on vacation, their travel plans will be disrupted," she said.