Rose Powell and Flame Brewer, both nine-years-old, have become the youngest in the world to perform wingwalking stunts in formation.
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Cool temperatures and breezy conditions with a top temperature of 20 Celsius (68 F).
Suicide bombers targetting Istanbul's airport incited panic to take lethal advantage in an attack that echoed the Brussels airport atrocity.
Brad Treat, 38, was killed on a trail in the Halfmoon Lakes area of the Flathead National Forest, just outside Glacier National Park.