Probably, but we have no idea what it is. (We might find out in 20 years, though - I'd expect a pocket force of stealth UCAVs) The US's 'black' planes have bee

Probably, but we have no idea what it is. (We might find out in 20 years, though - I'd expect a pocket force of stealth UCAVs) The US's 'black' planes have been remarkably successful, though that might be due to the fact that we never see their development and testing phase.