In the biggest show of force since the arrival of international peacekeepers in East Timor, Australian troops and helicopters today combed through part of the capital, Dili. They flushed out and arrested several pro-Indonesian militiamen, including a leader of the unit that has been blamed for some of the worst of the violence that followed the referendum on independence. Also today, another large contingent of Indonesian troops left Dili by sea. The Indonesian commander admitted what has been obvious for some time, that the security situation is beyond his control, and the Australian commander of the UN Sponsored peacekeepers said that establishing security throughout East Timor will be a lengthy process. NPR's Eric Weiner reports from Dili.