The meeting between U.S. and Russian leaders could lead to peace. But both Presidents Trump and Putin face big challenges in achieving their objectives.

Whether the U.S.-Russia summit can lead to a deal to produce peace in Ukraine more than 3 1/2 years after Moscow’s invasion remains to be seen.

When U.S. President Donald Trump and Russian President Vladimir Putin meet in Alaska on Friday, it will be the latest chapter in the 49th state's long history with Russia — and with international tensions.