Sentence:  If the U.S. had helped us acquire a <WSD>lightwater</WSD> capability [following the Gallucci-Kang talks in 1993], even if from a third country, we could have avoided the current problem, and we would have reached a point of greater confidence, and we would now enjoy improved relations. 
Meaning of the word marked with <WSD> tags:  Water in its standard form.