By James Barron
Published: January 21, 2010

The plane, a 50-seat regional aircraft that was less than a third full when it took off from La Guardia Airport, had been climbing through the early-morning sky for about 25 minutes. A 17-year-old passenger in a whitish sweater took out something he had carried onboard, and strapped it onto his wrist and his head. Read more. . .