Another example of using RPGs against helicopters is Operation ANACONDA in March 2002 in Afghanistan. Taliban Insurgents defending Shah-i-Kot Valley used RPGs in the direct fire role against landing helicopters. 4 rangers were killed when their helicopter was shot down by an RPG and SEAL team member Neil C. Roberts fell out his helicopter when it was hit by 2 RPG. In other instances helicopters have been shot down in Afghanistan during a mission in Wardak province. One feature that makes RPGs useful in Air Defence is that they are fused to automatically detonate at 920 m. If aimed into the air this causes the warhead to airburst which can release a limited but potentially damaging amount of shrapnel hitting a helicopter landing or taking off.