North Korea may have had a hand in a digital attack against Sony Pictures that used destructive malware to disable systems and destroy data, according to two people with the knowledge of the investigation.

Home Depots data breach, which put about 56 million payment cards at risk, has fed fraudulent transactions that in some cases have drained money from customer bank accounts, the Wall Street Journal reported.

The HealthCare.gov website was hacked in July, although no personal data appear to have been taken.

Home Depot, the largest home-improvement chain, says it is working with law enforcement to investigate a possible data breach.

The terrorist threat against the U.S. remains dangerous 10 years after the 9/11 Commission issued its first report -- only now the risk is greater online.