Mr. Chair, multiple testing was done at multiple levels. It started with sampling of the inner tubes of the generators. It started with evaluation on the model of the distribution of the nuclear substance in the generators themselves. In addition to all the testing, yes, we did go out and do the external measurements. Once we understood the distribution and the composition of the nuclear substance on the inside, we were able to determine the total amount of nuclear substance, the characteristics of the nuclear substance. Hence we say it's tagged to the inside. This technology has been around for many years and is part of the normal process in the operations. Sampling is taken out of these tubes.
