Fighters say they need to sell oil in order to finance their anti-regime battle in Libya, which has shifted focus from gaining territory to winning resources.<br /><br />They say they've surrounded the eastern oil port of Brega and they're also trying to move west from Misurata, but that they don't have resources to protect oil fields.<br /><br />Al Jazeera's Anita McNaught reports from Libya's eastern desert.
