When the night sky of the Persian Gulf is torn apart by the tail flames of the Thunderbolt-15 missiles, why do the J-10Cs painted with the crescent moon military insignia dare to face the Israeli air force directly over the Strait of Hormuz? Is Islamabad’s decision makers risking a break with the U.S. to cross the border and show their swords to avenge the old grudge of Israel’s military aid to India or to build a last line of defense to stem the tide of millions of refugees?