Mina taking off from one of her many perches on the hospital buildings. I've noticed from my vantage point on the roof that she invariably keeps the nest in view whenever she flies off it. Willie does the out-of-sight hunting while Mina makes sure she has a line-of-sight to her babies. An interesting related fact about hawks is that their eyesight is 8 times as powerful as a human's.
From Meet the Parents...and Pre-Incubation