A Romanian billionaire was killed — along with his wife, son and five other people — when the plane he was piloting crashed into a building in Italy on Sunday, local media reported. Dan Petrescu, 68, one of the richest men in his home country, was operating a single-engine Pilatus PC-12 that was seen in flames before it slammed into an office building undergoing renovations in San Donato Milanese, a town southeast of Milan, authorities said. The fatal wreck took place minutes after the plane took off from Milan’s Linate airport at about 1 p.m., according to aviation agency ANSV,...