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A presidential message turns cross-border wildfire smoke into an accountability fight, with big implications for diplomacy and risk planning.

The clash over Canadian wildfire smoke is spilling into trade leverage and raising the temperature on U.S.-Canada relations.

Wildfire season is nearly year-round. Now agencies and XPRIZE backers are testing drones to crush small fires early.

Six suborbital aircraft missions will map wildfires, pollution, glacier retreat, and landslide risk using airborne sensors.