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Figure 5 in Busby's second article about Fallujah. Upper left: The data as displayed by Busby, but we have added lines for natural uranium (137.88) and the 95% confidence limits where data are considered to be natural uranium. <b>Upper right:</b> We have added the arithmetic mean value and its upper and lower range, 1 standard deviation. <b>Lower left:</b> We have calculated the statistical errors for each data point. <b>Lower right:</b> We have added the weighted mean (red solid line) and the uncertainty on this value.