It is difficult to avoid the conclusion that Hariri's resignation, the Saudi purge, and the Houthi missile fired at Riyadh are interconnected.Saturday night was a busy one for Saudi Arabia’s Crown Prince Mohammed bin Salman. The kingdom’s 32-year old heir to the throne excelled himself. He surpassed the high levels of chaos and human misery he had already achieved as the defence minister who launched the air campaign on Yemen. First up was the sudden resignation of the Lebanese Prime Minister Saad Hariri after just one year in office. Hariri made his announcement from Riyadh, which is a curious place...