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Florida recipients of a program that protects hundreds of thousands of immigrants from deportation are in Washington, D.C., this week, calling on Congress to pass a law that will let them remain in the U.S. 

Beneficiaries of Temporary Protected Status (TPS) from Haiti, Nicaragua, El Salvador and Honduras will face deportation in the next two years after the Trump administration's recent decisions to end protections for immigrants from those countries. The program has provided immigrants with temporary lawful status and work authorization. 

Bernard Meric/AFP/Getty Images via NPR

When the Eyjafjallajökull volcano exploded in Iceland in 2010, the resulting ash cloud shut down air travel over Europe for around a week, stranding thousands of travelers.

Now, research at the University of South Florida is helping figure out how often these kinds of damaging explosions may occur and what can be done to track the ash clouds and reduce their impact on air travel.