Passage: An American man and former Delta Force operator, Yusuf (Sheen), makes a videotape. When FBI Special Agent Helen Brody (Moss) and her team see news bulletins looking for Yusuf, they launch an investigation, which is curtailed when they are summoned to a high school, which has been converted into a black site under military command. They are shown Yusuf's complete tape, where he threatens to detonate three nuclear bombs in separate U.S. cities if his demands are not met.

Question: who was asking for demands from the US?
Yusuf