Alex Lopez plays baseball with his sister Sugey while smoke generated by the Las Conchas fire covers the sky in Espanola, N.M. on June 29, 2011. As crews fight to keep the wildfire from reaching the country’s premier nuclear-weapons laboratory and the surrounding community, scientists are busy sampling the air for chemicals and radiological materials. (Jae C. Hong/Associated Press) (via Wildfire threatens nuclear facility - The Big Picture - Boston.com)

