Engineering publications brought to you by Mark Allen

Defence & security

DARPA funds Gallium Nitride research

Dropping bombs from UAVs

Material witness

Crowd control

Taking a liberty

Non-toxic shot-stopper

BAE Systems to buy UDI

Seamless access to materials database

Saab and Airbus sign A400M contract

Making munitions manifest

£30 million warship to be built in Portsmouth

Refuelling gets funding