Environment

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U.S. Border Patrol agents detain a group of men on National Wildlife Refuge land outside of Sasabe, Ariz., in 2006. Environmental concerns have limited the range of patrol agents along the U.S.-Mexico border. (Associated Press)

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Trash piles up along the Anacostia River in the District on Thursday. D.C. Council member Tommy Wells has a proposal to charge shoppers 5 cents for each plastic and paper bag to help pay for cleanup. (Associated Press/File)

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This image provided by NASA shows an artist concept of an Iridium satellite in earth orbit. Two big communications satellites collided in the first-ever crash of its kind in orbit over Siberia on Tuesday, Feb. 10, 2009, shooting out a pair of massive debris clouds and posing a slight risk to the international space station. The collision involved an Iridium commercial satellite, which was launched in 1997, and a Russian satellite launched in 1993 and believed to be nonfunctioning.

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Elkhart, Indiana, was where President Obama announced his economic stimulus package, which helped the area recover its business of making gas-guzzling recreational vehicles. (Associated Press)

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** FILE ** This photo released by the Fars News Agency claims to show an Iranian satellite launching rocket named "Safir-2," translated in English as "Ambassador-2," carrying the satellite "Omid," or "Hope" in English, photographed at launch at an undisclosed location on Monday, Feb. 2, 2009. Iran has successfully sent its first domestically made satellite into orbit, the country's president announced Tuesday, claiming a significant step in an ambitious space program that has worried many international observers.

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1,727 solar panels cover the rooftop of the Staples Center in Los Angeles. The off-grid system covers 24,196 square feet to power the sports complex and a theater. (Getty Images)

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Memorial Bridge and Roosevelt Bridge, which link Virginia and the District, are among those that will be closed on Inauguration Day. Authorities are asking people to use public transportation, as drivers in the city will face restrictions, including street closures. (Barbara L. Salisbury/The Washington Times)

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Putin gas muscle/Russian energy Gazprom Russian/Ukraine (CartoonArts International/The New York Times Syndicate/File)

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A man loads a wood-burning stove at his home in the town of Elin Pelin near the Bulgarian capital Sofia, Wednesday, Jan. 7, 2009. Bulgaria's energy ministry says Russian gas supplies to Bulgaria, Turkey, Greece and Macedonia have been suspended. Associated Press.

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**FILE** Hu Jintao is president of China, which has a one-child policy to control population growth. (Associated Press)

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An illuminated Citgo sign sits in the Kenmore Square section of Boston, where the headquarters of Citizens Energy Corp. is located. Last year, Citgo donated 100 million gallons of oil to the U.S. charity organization, which distributes it to low-income households.

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An artist depicts NASA's Phoenix Mars Lander, which touched down on the Red Planet on May 26. The landing was one of NASA's favorite advances of the year. (NASA/Jet Propulsion Laboratory)

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Seal of the Federal Bureau of Investigation

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** FILE ** Solar panels are seen outside the offices of the Sacramento Municipal Utility District in Sacramento, Calif., Wednesday, Dec. 10, 2008. (Associated Press)

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An estimated 1,200 undocumented migrants daily cross the Limpopo River, South Africa's equivalent of the Rio Grande separating the U.S. and Mexico. Most are from Zimbabwe, where shortages of food and fuel and an unemployment rate of more than 80% have sparked a steady exodus to the more stable and more prosperous South Africa. (Getty Images/File)