NATO poised to expand with Finland, Sweden
NATO welcomed decisions by Finland and Sweden to seek membership in the military alliance as foreign ministers met to discuss fast-tracking an expansion.
Warsaw Pact 1955-1991
Trump to pull U.S. from surveillance treaty
The United States announced it is withdrawing from a treaty that permits mutual unarmed surveillance flights over 34 nations.
Possible U.S. exit from Open Skies Treaty
Four senior Democrats in the U.S. Congress warned the Trump administration may withdraw from a treaty for mutual unarmed surveillance over 34 nations.
NATO tensions surface at 70th anniversary
NATO marked the start of its eight decade honoring its achievements, but revealed strains over spending and Russian and Chinese geopolitical ambitions.