1.   The three balloons competing this year are all held aloft by helium gas supplemented during the chill of night flying by hot air.

2.   The three balloons flying this year are all held aloft by helium gas supplemented during the chill of night flying by hot air.

3.   After flying all night from the United States, Mrs. Clinton went straight to meet with students at the Kazakstan Association of Youth Leaders.

4.   Filipino officers said the U.S. soldiers will mainly train the local troops on helicopter night flying and in other tactics involving sophisticated equipment.

5.   He added U.S. aircraft to be used to teach night flying would not be used for combat.

6.   Some will teach night helicopter flying and other specialized skills.

7.   The Americans are to train Filipinos in night helicopter flying, psychological operations and intelligence work.

8.   The Americans are to train Filipino soldiers in night helicopter flying, psychological operations and intelligence work.

9.   The sources said night flying was considered dangerous in the mountainous region unfamiliar to the Iranian pilot.

10.   The U.S. military has also been providing equipment and weapons to Filipino forces and is to train them in helicopter night flying, intelligence gathering and combat techniques.