Nick d'Aloisio displays his mobile application Summly, which Yahoo recently purchased for a reported $30 million. But the Internet company is killing the app and integrating the algorithm that drives it into its own technology.
Egyptians use their mobile phones to record celebrations in Cairo's Tahrir Square, the epicenter of the popular revolt that drove Hosni Mubarak from power in 2011. Twitter was often used to record happenings during the Arab Spring.
Mohammed Abed/AFP/Getty Images