On September 24th, U.S. President Barack Obama will preside over a U.N. Security Council session on nuclear nonproliferation and disarmament. In March 2010, Moscow will host a Global Nuclear Summit that the U.S. has agreed to attend.

The next six months could prove hopeful or harmful-depending on the impact on Israel's nuclear arsenal. With U.S. backing, Tel Aviv has thus far avoided compliance with the Nuclear Non-Proliferation Treaty-joining North Korea, India and Pakistan.

President John F. Kennedy tried to stop Israel from starting a nuclear arms race in the Middle East. In a June 1963 letter to Prime Minister David Ben-Gurion, he insisted on proof "beyond a reasonable doubt" that Israel was not developing nuclear weapons at its Dimona reactor facility. Though his letter was cabled to the U.S. embassy, Ben-Gurion resigned (citing undisclosed personal reasons) before the message could be physically delivered.

With …