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|A wildfire burns in the mountains above Avalon, Calif. on Catalina Island|
|Refugee camp in Daman District, Kandahar Province|
|Smoke from recent fires have created stunning sunsets like this one over the Sanibel Causeway April 30 and Wednesday's red sun|
|An artist's conception shows a gamma-
ray burst sweeping over Earth's
atmosphere, depleting ozone and
creating smog in the process. In reality,
the gamma radiation would be invisible.