Half of Saudi Arabia's oil production has gone offline following a surprise drone strike. Drones attacked Abqaiq facility in Saudi Arabia and the Khurais oil field run by Saudi Aramco early Saturday morning, the kingdom's interior ministry said, sparking a massive fire at a crude processing plant essential to global oil supplies. The closure will impact nearly 5 million barrels of crude processing per day, affecting 5 percent of the world's daily oil production. And while Aramco is confident that it can recover quickly, if it can't, however, the…