South Korean students prepare to take the College Scholastic Ability Test, a standardised exam for college entrance, at a high school in Seoul on November 7, 2013. South Korea has rescheduled flights and imposed strict traffic and noise restrictions as 650,000 as students take the college entrance exam which many see as a milestone that will define their adult lives. AFP PHOTO / JUNG YEON-JE        (Photo credit should read JUNG YEON-JE/AFP/Getty Images)