Coming Up on 'This Week' ... Sen. John Kerry and Sen. Richard Lugar

VIDEO: 60 percent of Americans say the war has not been worth
WATCH Poll: Support Drops for Afghanistan War

As the Christmas holiday approaches, the Senate tries to wrap-up a long list unfinished business. Senate Foreign Relations Chairman John Kerry and ranking Republican Senator Richard Lugar come to "This Week" exclusively to debate the START treaty, the Obama administration's Afghanistan war strategy, the impasse on funding the government and the chances for repealing Don't Ask, Don't Tell.

Then, it's a race against time to save millions of malnourished children around the world. As part of the ABC News "Be the Change: Save a Life" initiative, "This Week" looks at the effort to provide adequate nutrition to millions of babies for their first 1,000 days of life and give them a brighter future.

Could a simple food supplement be the end of malnutrition? Christiane Amanpour has a special report from Guatemala and an exclusive interview with USAID Administrator Rajiv Shah.

Plus our roundtable with George Will, Democratic political strategist Donna Brazile, Reuters Editor at Large Chrystia Freeland and Rajiv Chandrasekaran of the Washington Post will look at the meaning of progress in the Afghanistan war. And Amanpour takes a special look back at her time covering Ambassador Richard Holbrooke. Sunday on "This Week."

You won't want to miss it.