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The U.S.-Rus­sia sum­mit in Alas­ka is hap­pen­ing at a site where East meets West — quite lit­er­al­ly — in a place fa­mil­iar to both coun­tries as a Cold War front line of mis­sile de­fense, radar out­posts and in­tel­li­gence gath­er­ing.

Whether it can lead to a deal to pro­duce peace in Ukraine more than 3 1/2 years af­ter Moscow’s in­va­sion re­mains to be seen.

Here’s what to know about the meet­ing be­tween Russ­ian Pres­i­dent Vladimir Putin and U.S. Pres­i­dent Don­ald Trump, the first sum­mit in four years: