CAIRO, EGYPT - MAY 4:  In this handout image provided by PPM, Exiled Leader of Hamas, Khaled Mashaal (R) meets with President of the Palestinian National Authority, Mahmoud Abbas (2L) on May 4, 2011 in Cairo, Egypt. The rival factions, Fatah and Hamas, signed a reconciliation accord in Cairo after reaching common ground against Israeli occupation and peace efforts. Mashaal said they had a 'common goal; a Palestinian state with full sovereignty on the 1967 borders with Jerusalem as the capital'. Israeli Prime Minister Benjamin Netanyahu claimed that the reconcilation between the factions as a 'blow to peace', but the US declined to make any comment. (Photo by PPM via Getty Images)