Biomimicry,

at it's best,

one of these is a Peregrine Falcon, (Falco peregrinus), the other is a B-2 bomber, the peregrine falcon reaches faster speeds than any other animal on the planet when performing the stoop, which involves soaring to a great height and then diving steeply at speeds of over 320 km/h (200 mph), hitting one wing of its prey so as not to harm itself on impact. The air pressure from such a dive could possibly damage a bird's lungs, but small bony tubercles on a falcon's nostrils are theorized to guide the powerful airflow away from the nostrils, enabling the bird to breathe more easily while diving by reducing the change in air pressure. To protect their eyes, the falcons use their nictitating membranes (third eyelids) to spread tears and clear debris from their eyes while maintaining vision, this year marks the 20th anniversary of the B-2 bomber, one of America's most important and expensive weapon systems, 

and in the wings the B-21 getting ready to replace it, and apparently soon to be tested, I am guessing it still looks from the side like a Peregrine Falcon.