Putin Reveals 'Invincible' Nuclear Weapons

President Putin has said Russia is developing a new range of nuclear weapons, including a hypersonic missile, that can reach anywhere in the world and evade American defences. Could we be embarking on a new arms race?

Also in the programme: 'Oldest tattoo' found on 5,000-year-old Egyptian mummies; and we have a special report on the battle for the Yemeni capital, Sana'a.

(Photo: President Putin. Credit: AFP)