But Defense Secretary Liam Fox said Tuesday that Britain had shown it had the resources to play its part in the NATO operation.

In a briefing for reporters Monday, Adm. Mark Stanhope said he was comfortable with NATO’s decision to extend the Libya operation to the end of September.

He added: “Beyond that, we might have to request the government to make some challenging decisions about priorities. If we do it longer than six months we will have to reprioritize forces.”