Summary: The U.S. and Germany on Tuesday moved to send advanced weapons to Ukraine to blunt a Russian offensive in the east. Steven Simon, who worked on the National Security Council staff during the Clinton and Obama administrations and a fellow at the Massachusetts Institute of Technology joins Nick Schifrin to discuss the transfer of arms and the importance of diplomacy. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
