A reporter stands outside the front door of a house registered to a trading company operated by Navinder Singh Sarao in Hounslow, west of London. on April 22, 2015. Sarao was arrested in connection with the Wall Street flash crash of 2010. Adrian Dennis/AFP/Getty Images hide caption

itoggle caption Adrian Dennis/AFP/Getty Images

"Why does everyone have to be here at the same time? Why do we need to know how many hours a week people work?" — Ricardo Semler James Duncan Davidson/TED hide caption

itoggle caption James Duncan Davidson/TED

As the Nasdaq closes above the record set 15 years ago, stock analysts are debating whether the market is approaching another bubble. Bryan Thomas/Getty Images hide caption

itoggle caption Bryan Thomas/Getty Images

The headquarters of Deutsche Bank in Frankfurt. Germany's largest bank has been hit with a $2.5 billion fine for manipulating a key interest rate. Seven other banks in various countries have also been fined in the far-reaching scandal. Michael Probst/AP hide caption

itoggle caption Michael Probst/AP

Rida Sihab Mansour, a staff sergeant in the National Guard, stands with the uniform he wears when he serves on the honor guard at military funerals. He says he's positive that his guard commitments are making it more difficult to build a career. Katie Schoolov/KPBS hide caption

itoggle caption Katie Schoolov/KPBS

Hillary Clinton addresses the Pennsylvania AFL-CIO three weeks before the Democratic primary contest against Barack Obama. Seated at right is Pennsylvania AFSCME President Gerald W. McEntee. Charles Dharapak/AP hide caption

itoggle caption Charles Dharapak/AP

Intel Corp. co-founder Gordon Moore holds up a silicon wafer at Intel headquarters in Santa Clara, Calif., in 2005. Moore's prediction 50 years ago, called Moore's Law, has been the basis for the digital revolution. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP