The Latest: Obama says NATO must stand firm against Russia
WARSAW, Poland - The Latest on President Barack Obama's trip to Warsaw to meet with European leaders : President Barack Obama is calling on NATO to stand firm against Russia, terrorism and other challenges even as a key member retrenches from Europe. In an op-ed published in the Financial Times on Friday, Obama says the U.S. and European nation "must summon the political will, and make concrete commitments" to affirm European cooperation.