Iraqi militia leader killed in continuing US retribution

Details of how an American drone strike killed Iran-backed militia commander in Baghdad, as Washington responds to the attack on its bases in Iraq and Syria.

Israel's PM rejects Hamas's proposed ceasefire terms - we are joined by a senior Egyptian official to talk about where negotiations are at now.

Could a massive space umbrella save us from the worst effects of climate change - it's not a science fiction idea for a physics professor who joins us to talk more about it.