The owner of a Rochester, N.Y., pizza parlor pleaded guilty on Thursday to trying to recruit people to join Islamic extremists in the Middle East. The man, 31-year-old Mufid Elfgeeh, used the Internet to find potential supporters of the Islamic State in Iraq and Syria (ISIS), send them propaganda and support their efforts to join the extremist group in Syria, officials alleged. To spread his message, Elfgeeh used a combination of three Twitter accounts, 23 Facebook accounts and one WhatsApp account, which he used to seek out funding and support radical fighters, according to details in his plea agreement. From...