Soldiers may find themselves a long way from the comforts of a kitchen – but they always have to eat. BBC Future looks at the clever tricks to make food to eat on the hoof.

Freeze-dried and dehydrated foods are astronauts favourites because it retains all the nutritional value and flavour of ingredients. Also, it's easy and safe to store, prepare and consume.

Held at Oxford Town Hall, the Oxford Summit of Leaders is an interactive platform for international cooperation. Since 2000, it has been attended by more than 6000 delegates from 56 countries.