Q: In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.
Passage: Russian company Sukhoi has developed a fifth-generation jet fighter, the Sukhoi Su-XX, nicknamed Sabretooth, flown by test pilot Alexei Kedrov, from a remote Russian airbase. Recently suspected of being a traitor due to his love affair with American ecologist Catherine Foley, Alexei is patriotic and is unaware that Catherine is not who she claims and is working with London-based arms dealer Dick Murdoch. A mystery man also appears to control the effort to steal the Sabretooth.
Murdoch and his new partner Aziza, want to steal the Russian jet and employing numerous mercenaries and clandestine agents, puts the entire flight test unit in jeopardy. Worried about his family, pilot Boris Korin helps Murdoch steal Sabretooth.  When Catherine is seen to be falling for Alexei, she is eliminated along with other assassinations and an audacious attack on a former Russian outpost.  Alexei and other pilots in his team have to contend with not only the Russian FSB, but also agents from the CIA and British special services. 
When Air Force One on the way to Moscow, is threatened, the McDonnell Douglas F-15 Eagle escorts try to shoot down Sabretooth but Alexei uses the extraordinary capability of his top-secret aircraft to outfly the American attack and bring his aircraft home safely. 
Murdoch, however, with help from the mystery man behind the efforts to steal Sabretooth, is still at large.
A:
Who is the partner of the man Catherine Foley is working with?