a couple of air planes flying in opposite directions
how many airplanes do you see
2
do you see the pilots
no
is it a sunny day
no clouds, yes
do you see the plane instruments panel
no
are the planes close enough to collide
no
are they big jetliners
no
are they fighter planes
single engine small planes
do you see people in the planes
no
are they really  close to each other
no probably 100 feet separating the 2
do they have plenty of room to pass
yes