Australia pushes for resolution in Assange extradition case as US defends criminal charges

Australia's foreign minister said the case has dragged on too long and needs to conclude.
The US acknowledged talks with Australia but said Assange faces serious charges.
The US wants to extradite Assange from Britain on charges related to classified leaks.
Australia's government wants the case resolved but can't intervene in legal proceedings.
The US secretary of state said the leaks potentially harmed national security.