Obama vows U.S. response to North Korea over Sony cyberattack

By Aruna Viswanatha and Steve Holland WASHINGTON (Reuters) - President Barack Obama vowed that the United States will respond to the devastating cyberattack on Sony Pictures blamed on the North Korean government. Obama said the cyberattack "caused a lot of damage" to Sony but that he believed the company made a mistake in canceling the release of "The Interview," a comedy portraying the assassination of the North Korean leader, Kim Jong Un. "We will respond," Obama