Coming Close: America in Afghanistan; Bill and Willie Geist on Father-Son Talks; Mathematical Thinking

US soldiers of the Viper Company (Bravo), 1-26 Infantry, talk to Afghan men as they conduct a house to house search operation for weapons in the Khost province of eastern Afghanistan on June 19, 2011.

Anand Gopal explains how the US came close to victory in Afghanistan and what led to the resurgence of the Taliban. CBS "Sunday Morning" correspondent Bill Geist and his son Willie Geist, host of the "Today Show" and MSNBC’s "Morning Joe," share some of their father-son conversations over the years. Find out how math is a lot more than just addition, subtraction and long’s also the science of not being wrong.