WOW!! Does this mean the zoo has the largest captive pangolin population in the world?
It's possible, but more likely that the Pangolin Conservation organization (which is behind this sudden influx of pangolins) has more. However, PC is rather secretive (some even say shady) so we don't really know how many they have. From their media I've been able to confirm that they have had at least 2.3 recently- but if they are the source (i.e. while these are all wild caught [as far as we know], they spent time at the PC facility rather than going straight to zoos) then I imagine it is a significant amount more.
Regardless, Brookfield does hold the most out of the other American institutions. I don't know if any places elsewhere with more pangolins.