Note: The gas krypton has the atomic number 36 and, due to its high stability, is often used in lighting features, including runway lights at airports. Good news for us. Not so much for Superman.
THIRTY-SIX
this airport runway, lined
with lights fired by krypton,
welcomes home all who, unable to fly
on their own power, white-knuckle
land with the seatbelt sign on.
meanwhile the man of steel
flies on fast and free, far and near,
and each time after saving the world,
touches down to earth again,
but never here.