Zawahiri's victims: What it feels like to hear he's gone

Americans danced in the streets over the death of al-Qaeda leader Osama bin Laden. The killing of his successor has been met with a more muted response - but those robbed of their loved ones by Ayman al-Zawahiri's actions say his death matters too.

On 11 September 2001, roughly five seconds before American Airlines Flight 11 hit the north tower of New York's World Trade Center, the plane flew directly over Charles G Wolf's apartment building.

Trained as a pilot, Mr Wolf, 68, knew instantly that a twin-engine plane was...