News Wrap: Syria denies concealing mass prisoner executions

In our news wrap Tuesday, Syria denied U.S. claims that the regime is using a crematorium to incinerate corpses in order to conceal mass executions of thousands of prisoners. Also, North Korea has become the prime suspect in a global cyber attack. A growing number of cybersecurity experts now say lines in the ransomware code are identical to ciphers used by previous hackers linked to the country.