National security, unlocked. Each Thursday, host Mary Louise Kelly and a team of NPR correspondents discuss the biggest national security news of the week. With decades of reporting from battlefields ...

The roots of Russia's invasion of Ukraine go back decades and run deep. The current conflict is more than one country fighting to take over another; it is — in the words of one U.S. official — a shift ...

Once peer review is completed and the editor is satisfied that any concerns raised by the reviewers have been suitably addressed, the paper is accepted ‘in principle’ (AIP). The editor will send ...