A smartphone user shows the Facebook application on his phone in the central Bosnian town of Zenica, in this photo illustration, May 2, 2013. Facebook Inc said July 24, 2013 that revenue in the second quarter was $1.813 billion, compared to $1.184 billion in the year ago period. REUTERS/Dado Ruvic /Files (BOSNIA AND HERZEGOVINA - Tags: SOCIETY SCIENCE TECHNOLOGY BUSINESS)