Carie Lemack lost her mother, Judy Larocque, in the Sept. 11 terrorist attacks. Ten years later, Lemack is on a first-name basis with Sen. John Kerry as part of her mission to raise awareness so that another Sept. 11 doesn't happen. The Washington Post/Getty Images hide caption

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A TSA employee being trained in behavioral pattern recognition watches passengers in line at Boston's Logan International Airport in 2010. This week, Logan will become the first U.S. airport to require every passenger to go through behavioral profiling. Josh Reynolds/AP hide caption

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Sean Mullin, CEO of BI2 Technologies, scans his own eye with the MORIS, or Mobile Offender Recognition and Information System. The device attaches to an iPhone and allows police in the field to scan a person's iris, face or fingerprint and then check it against a database to verify his or her identity. Tovia Smith/NPR hide caption

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As part of her exercise routine, Curtis starts most mornings walking a gaggle of neighborhood toddlers to their day care. Tovia Smith/NPR hide caption

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Jazia Pratt fills a bucket with water from a fire hydrant in the afternoon summer heat in Philadelphia. Matt Rourke/AP hide caption

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Brianna Henderson and her brother Ian Henderson play on the Make Way for Ducklings statues in Boston. The bronze figures by sculptor Nancy Schon were installed in Boston's Public Garden in 1987. Joe Raedle/Getty Images hide caption

itoggle caption Joe Raedle/Getty Images