The unattributed killing of Iranian nuclear scientist Mostafa Ahmadi-Roshan last Wednesday, Jan. 11, was the subject of an angry phone call from US President Barack Obama to Israeli Prime Minister Benjamin Netanyahu the next day, DEBKAfilereports. Washington is concerned, the Wall Street Journal reported Saturday, that Israel may strike Iran's nuclear sites and has bolstered the defenses of US facilities in the region. In Jerusalem, Washington's strong and unusual slamming of the attack was deeply resented.