Don't mean to alarm you, but Boeing has built an unmanned fighter jet called 'Loyal Wingman'

Unarmed, but let's be real – it's only a matter of time, isn't it?

RoTM  Boeing has built an autonomous military aeroplane that flies in formation with a manned fighter jet to ward off electronic warfare attacks. Reports say the craft could be modified to carry and use its own weapons.…

from The Register