Facing President Trump's call for a quick ceasefire and bruising, new U.S. sanctions on Russia's oil industry, Putin is again reminding the U.S. and other Western allies of Kyiv about his nuclear arsenal to back his longstanding,

Russia appears to ramp up its military presence in the Arctic, but experts say its actions could have unintended consequences.

This cluster of quakes serves as a reminder that large subsea seismic events near Russia can trigger trans-Pacific tsunami alerts, with possible effects for Alaska, Hawaii, and the US West Coast. The pair of earthquakes that struck Saturday were both moderate in strength, measuring at 5.2 and 5.3 magnitude, according to the USGS.

Ukraine not only withstood the initial blow of Russia's full-scale invasion but also proved to the entire world its ability to effectively resist an army once called "the second strongest in the world.