IMF chief Christine Lagarde: Desperately optimistic

International Monetary Fund head Christine Lagarde says the current state of the world's economy is dire and unprecedented, but she remains "desperately optimistic" that if the right policies are adopted, jobs and growth will follow. Lagarde spoke to Lara Logan in Washington today for a profile to be broadcast on "60 Minutes" Sunday, Nov. 20 at 7 p.m. ET/PT.

Following are excerpts from today's interview with IMF Managing Director Lagarde to be broadcast Sunday:

On the economic situation and the worst-case scenario:

"It is a very serious situation, unprecedented in many ways. Stalled growth, high unemployment, potential social unrest as a result, and financial markets in disarray. A lot of volatility. Not a...pleasant picture."

On what she is most worried about in the United States:

"Political bickering! I would hope that on a bipartisan basis, both Democrats and Republicans can come to terms, in their super committee, about the deficit objectives and the deficit-cutting measures, and the debt....that is so much needed in the markets."