The body of a man is recovered from the rubble of a house destroyed by a Saudi-led air strike in Saada, Yemen, last August. Arms sold to Saudi Arabia have been used in the war waged on Yemeni Houthi rebels. Photograph: Naif Rahma/Reuters

The global arms trade has reached its highest volume since the end of the Cold War, partly due to purchases by Middle Eastern governments from the Uni(...)