In its first overture to Iran, the Obama administration is pushing to convene a high-level meeting on Afghanistan this month that would include an invitation to Teheran, Secretary of State Hillary Rodham Clinton said Thursday. The administration has been searching for ways to engage Iran, even as it confronts Teheran over its links to terrorism and pursuit of a nuclear program. Throughout her tour of the Middle East and Europe this week, Clinton has mixed tough talk about Iranian behavior with a hope that areas of cooperation can be found. She frequently cited Afghanistan as an example. Clinton announced the plan for the meeting during a gathering of NATO foreign ministers here, telling reporters it would be "a big-tent meeting with all the parties who have a stake and an interest in Afghanistan."