Yemen's crisis is getting worse and then some. Saudi Arabia and its Gulf allies have started bombing rebel positions inside Yemen. The Sunni Kingdom added that it would do "anything necessary" to deter the Iran-backed Shiite rebels who are taking over Yemen and trying to oust US-backed President Abd Rabbah Mansur Hadi. A Saudi source told Reuters that ground troops might be needed in Yemen to "restore order." Saudi Arabia is reportedly contributing as many as 150,000 troops and 100 warplanes to the campaign against the Houthis.