Late on Saturday night the first reports came in that the Iranian attack was under way. Hundreds of projectiles were already in the air and within a few hours would begin to enter Israeli airspace. The shadow war between Israel and Iran, which has shaped the entire Middle East over the last few decades, was over. The conflict was no longer between Israel and a host of Iranian proxies: it was now a direct, and potentially deadly, confrontation between the region’s two biggest powers. Just before 2am on Sunday morning, residents of Jerusalem were woken up by a series of...