Poland sees opportunity, peril in NATO summit and Trump-Putin meeting

WARSAW, Poland - For more than a week, the mock battles spanned day and night, hopscotching the length of NATO's eastern flank. The blue sky bloomed with white parachute canopies. American amphibious assault vehicles plunged through crashing Baltic surf. Elite troops carved a stealthy path through dense forest foliage. Artillery fire lit the dark skies.

Large-scale military exercises last month on Russia's doorstep - in Poland and the Baltic states of Estonia, Lithuania and Latvia - were meant to signal Western unity, resolve and readiness in the face of any potential threat.

But that message could be muddied this week when President Donald Trump takes center stage