Military and business leaders in the USA warned that further oil price rises resulting from the Libyan revolt would mean a heavy burden on strained Pentagon budgets and the US economy. General Charles Wald, the former deputy commander of European Command, said each $10 rise in a barrel costs the Pentagon an additional $1.3bn. "You start adding a billion here, a billion there, and that is a huge amount of money being spent, even in military terms," he said.