North Korea Destroys Nuclear Test Tunnels

Pyongyang appears to have blown up tunnels at its only nuclear test site in a move that may help reduce international tensions. Foreign reporters at the Punggye-ri site said they witnessed a huge blast.

Also in the programme: Investigators probing the downing of Malaysia airlines flight MH-17 over Ukraine says it has identified the Russian army unit that supplied the missile used to blow the airliner out of the sky; and how fruit bats may spread Ebola and the Nipah virus,

(Picture: North Korea's Punggye-ri site before the tunnels were destroyed. Credit: Reuters)