Greek officials say the Paris to Cairo red-eye flight was at cruising altitude when it made an abrupt turn left, then a 360-degree turn to the right as it dropped rapidly in altitude. Greek sailors in the area say they saw an explosion that "lit up the sky." Two large objects that may be wreckage have been spotted about 200 miles off the island of Crete.
Although aviation experts caution against speculation, this morning Egyptian officials said terrorism was the more likely scenario than mechanical failure. NPR's Eleanor Beardsley brings Here & Now host Robin Young up to date on the latest news.
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This segment aired on May 19, 2016.