Yen was a member of the World Security Council and one of the prime overseers of S.H.I.E.L.D.'s operations. During the launch of Project Insight, Yen was killed by Alexander Pierce after HYDRA's infiltration of S.H.I.E.L.D. was revealed.
Yen, along with the rest of the council was called to the Triskelion by Pierce to witness the launch of Project Insight. When Pierce's was exposed by Captain America as a part of HYDRA's infiltration within S.H.I.E.L.D., STRIKE, which was composed of HYDRA members, held the Council hostage, until Black Widow who had been disguised as Councilwoman Hawley took the HYDRA operatives out.
Yen took one of the unconscious STRIKE members guns and held it at Pierce to keep him at bay. He stood by as Nick Fury arrived and as Black Widow released all S.H.I.E.L.D. files to the public. Unnoticed by the others, Pierce moved to his phone pressed a button and the security badges on the council members' chests exploded, killing them.
- World Security Council