US President Barack Obama speaks during the AIPAC Policy Conference at the Washington Convention Center on March 4, 2012 in Washington, DC. A powerful US pro-Israel lobby on opened an annual conference where thousands of delegates seem intent on hearing Obama echo the Jewish state's fears about Iran's nuclear aims. Obama's speech to the American Israel Public Affairs Committee may well set the tone for his meeting Monday with Israeli Prime Minister Benjamin Netanyahu, who will also speak to AIPAC after the pair's White House encounter. AFP Photo/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)