1.   In any case, it said private shipyards could be used to refuel the Los Angeles Class submarines now maintained at Portsmouth.

2.   The aircraft is used mainly for in-flight refueling of helicopters but can also be used to refuel other planes.

3.   He said the plane, which is used to refuel fighter jets and helicopters, was carrying large containers of fuel when it crashed.

4.   This type of plane is used to refuel other planes while in the air, either during missions or in training.

5.   A Pentagon spokesman confirmed that a tanker plane used to refuel other planes had crashed in Pakistan but said the circumstances were not immediately known.