Did not say it was impossible. Said it was difficult and the longer the supply gets the harder it is to hold. Sarajevo seemed to have been bottled up everyone on the inside.
Absolutely fascinating story. Some very strange things changed with regard to warfare in that incredibly confusing conflict. For example, there's the strange case of Helge Meyer. And his souped-up, bulletproof Camaro. Posted for your amusement, actually, but equally strange things are likely to be happening even as we type.