Ukrainians behind car bombing that killed daughter of key Putin ally, US believes
Darya Dugina was killed in the attack in Moscow in August but Kyiv has always denied any responsibility
Murder of Solomos Solomou: This is how his assassination was ordered (photos)
Years later the then commander of the Turkish army's special forces in the occupied territories, Hasan Kudaktsi, confessed ordering the assassination "with a nod"
How the CIA identified and killed Al-Qaeda leader Zawahiri
For several years, the US government had been aware of a network that it assessed supported Zawahiri