For years, Lebanese have known that Palestinian camps like Nahr al-Barid and Ain al-Helwe - hopeless slums crowded with generations of disenfranchised Palestinian refugees who can't go home because of Israel, and can't work because of Lebanese laws - are awash with gunmen, criminals and, since the war in Iraq, al-Qaida inspired jihadists.
Faced with the crippling sanctions, Iran could simply decide it is paying too high a cost to pursue its nuclear program and could opt for negotiations and reconciliation with the United States and other members of the international community. This is clearly the preferred option of American leaders.