"This is not the time for a new commander to come in to rethink strategy," said Malcolm Chalmers of Britain's Royal United Services Institute, a British think tank.
Relief greets Obama pick for new war commander →
"There's a very difficult trade-off for NATO here," Chalmers said. "If they wait until they're absolutely certain that they've got the targets right and that there are no civilians, Gadhafi's forces will have vanished in the confusion by then."
NATO criticized over Libya campaign →