President Trump said he would decide whether to attack Iran “within the next two weeks,” raising the possibility of revived negotiations on the future of Iran’s nuclear program.

John Simpson, in discussion with the BBC’s unparalleled range of experts across the world, analyses whether Israel’s attacks on Iran could lead to regime change, assesses the effectiveness of the G7 in dealing with international crises, and examines what the consequences might be of a global drop in human fertility.

Israel and Iran have been enemies for decades — but this is their most sustained direct fighting ever. Here’s how a shadow war erupted into an overt conflict.