1.   As helicopter gunships buzzed overhead and tanks shelled two blocks of flats nearby, bulldozers set about destroying a swath of homes.

2.   As soldiers jumped out of the lorries, firing all around, helicopter gunships appeared overhead.

3.   Countless unarmed civilians fleeing to the borders were killed by helicopter gunships.

4.   It is indisputable, however, that the warplanes and helicopter gunships occasionally make mistakes.

5.   One helicopter gunship had been brought down by small-arms fire.

6.   Our forward observer and company commander came up and called in some helicopter gunships.

7.   Slowed by heavy rains, the convoy was shielded by helicopter gunships and armoured personnel carriers.

8.   Meanwhile SOC forces were reported to have used Soviet-supplied helicopter gunships for the first time in March in an attack on Khmer Rouge positions around Pailin.