THE MIGHTY DERRINGER EXERCISE
>>In late January and early February 2012, members of the Department of Energy's Nuclear Emergency Support Team(NEST)patrolled Lucas Oil Stadium as well as surrounding areas of Indianapolis as a precautionary measure in advance of Super Bowl XLVI. An initial survey to gather information on background levels of radiation was followed by an actual search for signatures associated with either a nuclear explosive device or a radiation dispersal device (a 'dirty bomb').1 Fortunately, none was found.
https://nsarchive2.gwu.edu/nukevault/ebb380/
https://thehill.com/blogs/blog-briefing-room/3255814-secret-video-shows-governments-fake-newscast-about-nuclear-strike-on-indianapolis/