JERUSALEM – The U.S. should encourage greater assimilation of the Hezbollah terrorist organization into the Lebanese government, argued President Obama's counter-terrorism advisor, John Brennan. Outside of al-Qaida, the Iranian-backed Hezbollah has the distinction of having killed the most Americans in terror attacks. It is also responsible for scores of terrorist actions targeting Israelis, including rocket launchings against civilian population centers. Hezbollah's attacks against the Israeli north in 2006 killed 43 Israeli civilians and wounded more than 4,000.