Ahead of the nuclear summit Monday in Seoul, President Obama met with Russian President Dmitry Medvedev and discussed prospects for further nuclear reductions for both nations. Judy Woodruff discusses nuclear issues with Ploughshares Fund President Joseph Cirincione and nuclear proliferation…

President Obama said Tuesday he still hopes Iran's nuclear threat could be resolved diplomatically. Jeffrey Brown explores potential diplomatic solutions to growing tensions between the U.S., Iran and Israel with the Brookings Institution's Suzanne Maloney and The Washington Institute for…