As President Joe Biden arrived at the NATO gathering site on Wednesday, he said it will be a "history-making summit," where leaders will "reaffirm the unity and determination to our alliance to defend every inch NATO territory." Biden pledged to boost the U.S. military presence in eastern Europe, including establishing a permanent presence in Poland, as he gathered Wednesday with other NATO leaders at a summit intended to show resolve against Russian President Vladimir Putin's war in Ukraine. Meanwhile, Biden also met with other leaders in the Group of Seven, which is comprised of the world's seven largest and most advanced economies, earlier this week. The nations are moving closer to capping the price that countries can pay for Russian oil, a senior U.S. official said. "It is a new kind of concept to deal with a particularly novel challenge, which is how to effectively deal with a country that’s selling millions of barrels of oil a day and try to deprive it of some of the revenues that they're getting from the sale of that oil," Jake Sullivan, Biden's national security adviser, said. Click the link in our bio for more details on Biden's visit to Europe. 📸: @apnews, @gettyimages