Central Intelligence Agency Director John Brennan takes questions after addressing the Council on Foreign Relations on March 11. The CIA has proposed deleting the email of almost all employees after they leave the agency. But some critics are saying a larger portion of the email should be preserved. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

Amateur cook and writer Maureen Evans has perfected the art of tweeting a recipe in 140 characters or less. fot. Wojciech Zalewski/iStockphoto hide caption

itoggle caption fot. Wojciech Zalewski/iStockphoto

Artist Dan Roosegaarde pays tribute to Vincent Van Gogh's painting Starry Night by creating this bike path in Van Gogh's hometown of Eindhoven. Courtesy of Studio Roosegaarde hide caption

itoggle caption Courtesy of Studio Roosegaarde

Isabelle Olsson, the lead designer of Google Glass, says she is encouraging more women to enter the tech industry — not just as designers, but in all capacities. AFP/AFP/Getty Images hide caption

itoggle caption AFP/AFP/Getty Images

One of the four non-profits to benefit from the Google matching campaign is Doctors Without Borders, which held an Ebola training program last week in Amsterdam. Jasper Juinen/Getty Images hide caption

itoggle caption Jasper Juinen/Getty Images

A global positioning receiver on the top of a combine harvester at a farm in Warwick, Md., in June. The equipment uses sensors and computers to help drive the combine along the route where the crops were planted, judge the composition of a crop and generate crop yield reports. Brendan Smialowski/AFP/Getty Images hide caption

itoggle caption Brendan Smialowski/AFP/Getty Images