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The Border Patrol's indicators of success for Operation Streamline don't always add up and neither do the numbers: No one knows just how much the program costs. The Border Patrol makes arrests, but the Justice Department and federal courts provide the logistics of convicting those who cross illegally.

The country's spiraling unemployment rate continues to take a particular toll on men. The "he-cession," as it's sometimes called, has hit African-American men especially hard, increasing their unemployment rate to more than 17 percent last month.

Americans are increasingly using hand-held devices to access the Internet and for texting, sending e-mails, playing music and instant messaging. A large number of those hyperusers are young Latinos and blacks, who crave the convenience of staying connected wherever they go.

Climate scientists say Colombia's glaciers could disappear within 15 years. Wet highland areas that provide much of the country's fresh water are getting warmer and drier. And each year, flooding becomes more severe. The coastal area of Tumaco has become an example of how environmental and security pressures are undermining previously stable communities.

Americans are increasingly using hand-held devices to access the Internet and for texting, sending e-mails, playing music and instant messaging. A large number of those hyperusers are young Latinos and blacks, who crave the convenience of staying connected wherever they go.

Use of CT scans in the U.S. has more than tripled in less than two decades. Despite the medical benefits, these scans emit a significant amount of radiation. A new study estimates that 29,000 future cancers could be related to CT scans performed in the U.S. in 2007.

Use of CT scans in the U.S. has more than tripled in less than two decades. Despite the medical benefits, these scans emit a significant amount of radiation. A new study estimates that 29,000 future cancers could be related to CT scans performed in the U.S. in 2007.

People born and raised in Suffolk County, N.Y., complain about dozens of people living in single-family homes; immigrants complain that they are victimized by locals. An Ecuadorean day laborer was murdered last year, allegedly by teenagers who said they regularly looked for immigrants to bash.

People born and raised in Suffolk County, N.Y., complain about dozens of people living in single-family homes; immigrants complain that they are victimized by locals. An Ecuadorean day laborer was murdered last year, allegedly by teenagers who said they regularly looked for immigrants to bash.

The U.S. dollar has fallen more than 12 percent from its recent peak. Amid worries that it will continue to weaken, some central banks are keeping more of their reserves in euros and yen. There has even been talk of finding an alternative to the greenback as the world's major reserve currency.