Alireza Jafarzadeh, Iran’s President’s death - What does this mean for the United States?

Alireza Jafarzadeh, the deputy director of the Washington office of the National Council of Resistance of Iran, is credited with exposing Iranian nuclear sites in Natanz and Arak in 2002, triggering International Atomic Energy Agency inspections.

He is the author of "The Iran Threat”.

Iran’s President's death.

What does this mean for the United States?