Major 'Sticking Point'India wants to retain the right to test nuclear weapons.Under US law, not only would the nuclear deal be off, Washington also has the right to seek return of material and equipment subject to the agreement.A way out: presidential waiver from the requirements of US law.The problem: future presidents could overturn the waiver. Also, US could take back only unused fuel and compensate India monetarily.***IOutlookOutlookOutlookOutlook