As Mariupol hangs on, the extent of the horror is not yet known

Perched on the Sea of Azov, Mariupol has been a key target that has been relentlessly pounded by Russian assaults for more than 3 weeks and has seen some of the worst suffering of the war.

Maine senators return to U.S. following weekend visit to Germany, Poland

Susan Collins and Angus King were part of a Senate delegation that met with German officials, representatives from humanitarian aid agencies, and Ukrainians forced to flee their homeland following Russia's invasion of their country.

Amid new bombings, Ukraine now seen as a war of attrition

Ukrainian authorities say Russia’s military bombed an art school sheltering some 400 people in the besieged port city of Mariupol.

Facts about NATO

What if the war in Ukraine spreads to a NATO country?

Article 5 of the Nato treaty calls for collective defense if a member nation is attacked.

What’s NATO, and why does Ukraine want to join?

One of Putin’s demands for de-escalating conflict with Ukraine is NATO blocking Ukrainian membership. Understanding what NATO is, and why Ukraine wants to join, clarifies why Putin wants this.

Why 8 NATO members triggered article 4 of the North Atlantic Treaty

Russia’s invasion of Ukraine poses a security threat to member states of Nato.

Russians push deeper into Mariupol as locals plead for help

Russian forces have pushed deeper into Ukraine’s besieged and battered port city of Mariupol.

Russia-Ukraine war: Key things to know about the conflict

Fighting is raging again on multiple fronts in Ukraine, with intense combat in the besieged port city of Mariupol — site of some of the war’s greatest suffering.

‘My entire nation is in torture,’ says Bates student from Ukraine

A first-year student at the Lewiston college worries about friends and family in his homeland.