How the CIA targeted Al-Qaeda leader Zawahiri

Al Qaeda leader Ayman al-Zawahiri was killed in a U.S. strike in Afghanistan over the weekend, the biggest blow to the militant group since its founder Osama bin Laden was killed in 2011. The operation to locate and kill Zawahiri was the result of "careful patient and persistent" work by the counter-terrorism and intelligence community, a senior Biden administration said. Lisa Bernhard produced this report.