Federal agents over the weekend arrested a Pinellas Park man described as having extremist jihadist beliefs who wanted to blow up a target in Tampa and create "terror" in victims' hearts. "I want to do something terrifying," he said, according to a federal complaint, "like one day, one night, something's going to happen. Then six hours later, something else." Sami Osmakac, 25, was taken into custody after an FBI sting operation in which he tried to buy explosives, at least 10 grenades, Uzis and an AK-47, authorities said. Osmakac's intended target shifted over the course of the investigation, which spanned...