Learn how the US planned the attack on Ayman Al-Zawahri for months until he was killed

The drone attack that killed America's most wanted terrorist, Ayman Al-Zawahri, was the fruit of months of secret planning.

The State Department would have offered a reward of up to US$25 million for information that would allow him to be caught.

Miguel Antoñanzas recounts how the attack in Kabul was.