![A Swiss Air Force F-5E Tiger aircraft lands in Payerne after a radioactivity measurements flight over Switzerland March 23, 2011. An aerosol collector is located under each wings of the aircraft and A Swiss Air Force F-5E Tiger aircraft lands in Payerne after a radioactivity measurements flight over Switzerland March 23, 2011. An aerosol collector is located under each wings of the aircraft and](https://c8.alamy.com/compfr/2cxj5n6/a-swiss-air-force-f-5e-tiger-aircraft-lands-in-payerne-after-a-radioactivity-measurements-flight-over-switzerland-march-23-2011-an-aerosol-collector-is-located-under-each-wings-of-the-aircraft-and-filters-the-air-to-collect-fines-particles-at-an-altitude-of-10000-meters-32808-feet-to-15000-meters-49212-feet-the-federal-office-of-public-health-foph-has-been-conducting-flights-on-a-regular-basis-in-the-past-years-to-monitor-the-radioactivity-but-due-to-the-situation-in-japan-decided-to-increase-them-until-end-of-march-2011-the-results-are-not-known-yet-reuters-denis-balibouse-s-2cxj5n6.jpg)
A Swiss Air Force F-5E Tiger aircraft lands in Payerne after a radioactivity measurements flight over Switzerland March 23, 2011. An aerosol collector is located under each wings of the aircraft and
![Swiss Intl Air Lines on Twitter: "And what breathtaking scenery does the weekend have in store for you?🌍✨ https://t.co/olhIJIAb1w" / Twitter Swiss Intl Air Lines on Twitter: "And what breathtaking scenery does the weekend have in store for you?🌍✨ https://t.co/olhIJIAb1w" / Twitter](https://pbs.twimg.com/media/EzgSM-7XMAQpOFS.jpg)
Swiss Intl Air Lines on Twitter: "And what breathtaking scenery does the weekend have in store for you?🌍✨ https://t.co/olhIJIAb1w" / Twitter
![A worker removes a aerosol collector of a Swiss Air Force F-5E Tiger aircraft in Payerne after a radioactivity measurements flight over Switzerland March 23, 2011. An aerosol collector is located under A worker removes a aerosol collector of a Swiss Air Force F-5E Tiger aircraft in Payerne after a radioactivity measurements flight over Switzerland March 23, 2011. An aerosol collector is located under](https://c8.alamy.com/comp/2D0PHK9/a-worker-removes-a-aerosol-collector-of-a-swiss-air-force-f-5e-tiger-aircraft-in-payerne-after-a-radioactivity-measurements-flight-over-switzerland-march-23-2011-an-aerosol-collector-is-located-under-each-wings-of-the-aircraft-and-filters-the-air-to-collect-fines-particles-at-an-altitude-of-6000-meters-19684-feet-the-federal-office-of-public-health-foph-has-been-conducting-flights-on-a-regular-basis-in-the-past-years-to-monitor-the-radioactivity-but-due-to-the-situation-in-japan-decided-to-increase-them-until-end-of-march-2011-the-results-are-not-known-yet-reutersdenis-balibouse-2D0PHK9.jpg)