The US and Israel are striking Iran for a fourth day after the American embassy in Saudi Arabia was hit by a drone. The UK is considering sending a warship to Cyprus after a strike on an RAF base.

One person inside Iran says "every part" of the capital has been hit. Elsewhere, Israel says ground troops will advance in Lebanon, and Iranian strikes continue in the region.

Iran poses no remotely plausible threat to the United States, the Constitution prohibits presidents from going to war without ...