Al Qaeda 's number two leader was killed in a CIA drone strike . Peter Bergen says it shows that the terrorist organization is effectively out of business . He says the only senior leader left is Ayman al-Zawahiri , the successor to bin Laden . Bergen : The U.S. has been trying for years to kill or capture him and his top lieutenants. al Qaeda is more irrational than fearing a lightning strike .
Al Qaeda 's number two leader was killed in a CIA drone strike . Peter Bergen says it shows that the terrorist organization is effectively out of business . He says the only senior leader left is Ayman al-Zawahiri , the successor to bin Laden . Bergen : Fearing present day al Qaeda is more irrational than fearing a lightning strike .