The Union Jack hoisted on one of the 28 flagpoles outside the European Commission building might as well have been flying at half-staff. Even before David Cameron arrived in Brussels Tuesday for what was almost certainly his final summit as British prime minister, EU Commission President Jean-Claude Juncker was setting the tone for the day ahead. And, as with the stages of mourning for a dear departed friend, anger, denial and finally acceptance would all play their role at this Brexit wake. Christian Democratic Union Deputy Leader Michael Fuchs discusses next steps with Bloomberg's Francine Lacqua on "The Pulse."