Vice President Mike Pence is just the latest in a line of officials to visit Estonia.
Afghan officials say a U.S. airstrike killed 16 police officers Friday.
Poland will bus in supporters to cheer in the crowd for Trump's visit to Warsaw. Poland is one of Trump's biggest European supporters.
President Trump will visit France to reaffirm "America's strong ties" with the country after a rocky start.
The head of NATO says defense spending could jump to more than 4 percent this year.
NATO soldiers practiced defensive drills in the Suwalki Gap, an area near the border of Poland and Lithuania.
At least 11 U.S. troops have been injured or killed in suspected attacks by Afghan troops since June 10.
Trump didn't commit to collective defense at the NATO meeting in Brussels, to Europe's dismay. Now, he's made a U-turn.
After years of work, NATO officially inducted its 29th member nation - and Russia isn't pleased.
President Donald Trump tweeted the U.S. has a "MASSIVE trade deficit with Germany," which he says isn't good for Americans.
Donald Trump applauded his ability to "strengthen" American bonds, while German's chancellor said it's apparent Europe is on its own.
He says he'll make a decision next week.