Beijing Correspondent Louisa Lim is currently attending the University of Michigan as a Knight-Wallace Fellow. She will return to her regular role in 2014.
An Ohio man was convicted of cybercrimes involving obscene AI-generated images of women and children. But experts warn of the difficulties in going after such cases.
Drug overdose deaths are plummeting in the U.S. in ways never seen before. Experts worry new, toxic "synthetic" street drugs could derail the recovery.