Update, 7:30 p.m.:
An autistic young man from Alexandria who had been missing since Wednesday was found Thursday evening by police at Reagan National Airport, authorities said.
Adam Kling, 24, lives with his parents in Old Town. He left home around six p.m. Wednesday evening, his mother Elizabeth Kling said earlier, telling her he was headed to the Barnes & Noble bookstore at Potomac Yard.
Kling was diagnosed early in life with Pervasive Developmental Disorder-Not Otherwise Specified,” a relatively mild form of autism.