[TruBluKentuckian]

Um... Meehan needs to look at a map of Vietnam and Cambodia.

The Mekong river doesn't run parallel to the two countries, it crosses the border at almost a 90 degree angle. It's impossible for Cambodians to be firing from one side from Cambodia, and Vietnamese to be firing from the other, from inside Vietnam.

[Howlin]

I just love this stuff, don't you?

[Oztrich Boy]

It's impossible for Cambodians to be firing from one side from Cambodia, and Vietnamese to be firing from the other, from inside Vietnam.

Well not Cambodians, but it could be Chinese firing from one side of the Mekong in Tibet, and Vietnamese on the other in the South China Sea (it depends on whether you are looking side to side on the short dimension, or the long)