Passage: Xander survives due to a bulletproof vest Becky had given him earlier and joins forces with Xiang to fight Donovan and his men, while Marke uses the box to send a satellite plummeting towards the warehouse where the teams are fighting. Xander ejects Donovan from the plane, while Xiang sends Marke falling to her death and then parachutes out with the box in hand. Despite Becky's attempts to halt the signal, they cannot stop the satellite from crashing. In a last attempt to protect them, Xander crashes the plane into the approaching satellite before it reaches the warehouse and jumps out, using the cargo load to safely reach the ground. Xiang gives Cage the device, and Xander decides to destroy it. The team attends Gibbons' funeral, where Xander is approached by Gibbons himself, who faked his death and is now rebuilding the XXX Program on his own, starting with Neymar as the newest recruit. Gibbons compliments Xander on a job well done and Xander decides to continue in service, ready for a new mission to watch the watchers and preserve liberty.

Question: Who is responsible for Marke's death?
Xiang