MARK HARMON GUEST STARS; RUSSIAN LINAGE TO IRANIAN NUCLEAR WEAPONS COULD WRECK SUMMIT PLANS -- As Sam works out the President's final maddening details of an important upcoming summit with the Russian president, satellite photos reveal an Iranian nuclear bomb facility built with Russian technology -- a revelation that could torpedo the leaders' meeting. Elsewhere, C.J. makes a harsh public statement about the deaths of Saudi young girls, prompting Bartlet to assign her Secret Service protection.