Egypt’s parliament on Monday authorized military support to defend Saudi Arabia, the same day Yemen’s Houthis claimed unconfirmed attacks on pumping stations along the kingdom’s East-West crude pipeline and on Riyadh’s King Khalid International Airport. The Houthis had warned Cairo against the move. Yahya Al Raei, speaker of the Houthi-run parliament in Sanaa, wrote to Egyptian Speaker Hisham Badawy last week that joining the conflict “would pose a grave danger” to Egypt’s national security. The approval…