Iranian Foreign Minister Mohammad Javad Zarif spoke to NBC News' Bill Neely in an exclusive interview on the sidelines of the Munich Security Conference.
After tweeing about Russian election meddling and the Obama administration's policy on Iran, President Trump also called Oprah Winfrey "insecure" and "biased."
Russian curlers say a coach on their team has told them that mixed doubles bronze medalist Alexander Krushelnitsky tested positive for a banned substance.
Companies selling some of the most lucrative prescription painkillers funneled millions to advocacy groups.
Students are taking hold of the gun debate after the Florida school shooting by organizing school walkouts across the country and a march in Washington.