Iodine-131 in Europe

Small quantities of Iodine-131 have been detected in Europe.  Now WC-135 "nuke sniffer" aircraft are being deployed in Europe to investigate.  I'm wouldn't be surprised if these reconnaissance aircraft do more than measure radioactivity. Is this an example of problem, reaction, solution?

https://theaviationist.com/2017/02/19/u-s-air-force-deploys-wc-135-nuclear-sniffer-aircraft-to-uk-after-spike-of-radioactive-iodine-levels-detected-in-europe/