| Do airdrops from low to high altitudes at night and under adverse conditions. |
| The initial reintroductions of river otters at high altitudes didn't seem to take. |
| Stingers can shoot down aircraft, including civilian jetliners, flying at low altitudes. |
| There are also a large number of birds that are spotted at the higher altitudes so the climb is well worth the effort. |
| Well-trained, acclimatized troops must be available to replace those at higher altitudes. |
| The rest of the flight is done at altitudes that those missiles cannot reach. |
