Minimizing potential threats from Iran : assessing the effectiveness of current U.S. sanctions on Iran : hearing before the Committee on Banking, Housing, and Urban Affairs, United States Senate, One Hundred Tenth Congress, first session, on oversight of Iran policy including efforts to isolate and contain Iran economically, to assess progress, and to strengthen these efforts while considering additional diplomatic, economic, political, and other steps to engage the international community more effectively in efforts to prompt Iran's leaders to reconsider their reported nuclear ambitions, their support for terrorism, and their continuing opposition to the Middle East peace process, Wednesday, March 21, 2007.