A flight to Antarctica is among the hardest in the world because of the freezing conditions and because a runway must be physically created on the ice.

Three staff members from the National Science Foundation were evacuated from a U.S. research base after a medical emergency. The mission is one of the most challenging for the air force.

A New Zealand air force C-130J Super Hercules crew completed a high-risk midwinter medical evacuation from McMurdo Station in Antarctica, U.S. and New Zealand officials said.