People pose with laptops in front of projection of Facebook logo in this picture illustration taken in Zenica

People are silhouetted as they pose with laptops in front of a screen projected with a Facebook logo, in this picture illustration taken in Zenica October 29, 2014. Facebook Inc warned on Tuesday of a dramatic increase in spending in 2015 and projected a slowdown in revenue growth this quarter, slicing a tenth off its market value. Facebook shares fell 7.7 percent in premarket trading the day after the social network announced an increase in spending in 2015 and projected a slowdown in revenue growth this quarter. REUTERS/Dado Ruvic (BOSNIA AND HERZEGOVINABUSINESS LOGO — Tags: BUSINESS SCIENCE TECHNOLOGY LOGO TPX IMAGES OF THE DAY)