Repeated strikes by Yemen's Houthis on Saudi Arabia's airports in Dammam and Riyadh over the weekend of Oct. 10-11 killed at least 14 people and interrupted several high-profile business conferences, like the WPC Energy Congress in Riyadh, threatening the viability of the annual Future Investment Initiative later in October, AP reported on Oct. 11. Meanwhile, U.S. President Donald Trump said the United States "may" attack the Houthis in reaction to the Riyadh attack, which killed one American, as the USS Theodore Roosevelt approached the region to temporarily bring three U.S. aircraft carrier battle groups to the area.