attack, retreat, repeat. maybe not an ideal strategy, but for nuclear experts in japan and self-styled freedom fighters in libya, it's the only strategy they have. we begin this hour with what the libyan rebels are calling a tactical withdrawal. their back-and-forth sweep is once more moving back, under fire from territory held by the only libyan rule most have ever known, moammar gadhafi. here's the map we showed you 48 hours ago, a rapid push from the unofficial rebel capital of benghazi. you see it on the map to the outskirts of gadhafi's hometown of sirte. now look at this, the landscape today. regime forces once more on the offensive, driving the rebels back near or even past the town of al brega. in a news conference, an opposition spokesman says his side needs more than air strikes from the u.s. and his partners. he asked for tanks, artillery,