Top Russian military leaders repeatedly decline calls from U.S., prompting fears of ‘sleepwalking into war’

The United States says Russia is committing war crimes as its invasion of Ukraine enters its second month. President Joe Biden will huddle with world leaders in Europe today, aiming to ramp up the pressure on a defiant Moscow. NATO allies are beefing up their forces in the region while Ukrainians rely on creative tactics to beat back Russian troops. Here’s what you need to know.