Las Vegas residents are likely to see a low and slow-flying helicopter over the valley on Sunday and Tuesday. The U.S. Department of Energy’s National Nuclear Security Administration will conduct ...

MILWAUKEE - A helicopter was flown low over downtown Milwaukee on Tuesday, July 9. Now, officials have confirmed it has to do with security and safety for the Republican National Convention. The U.S.

As is practice with major Las Vegas events, the Department of Energy and National Nuclear Security Administration will begin helicopter radiological surveys Tuesday and Wednesday in advance of the Las ...

LOS ANGELES (CBSLA) — Authorities are completing background radiation measurements over Southern California as part of the security precautions being put in place ahead of the Super Bowl. According to ...

The Department of Energy said Friday low-altitude helicopter flights to measure background radiation will be conducted over New Orleans Feb. 2 through Feb. 6 as part of security precautions for the ...

Over the next several days you may see a helicopter hovering over downtown Milwaukee measuring "background radiation". Officials say this is standard security protocol and there's no need to be ...

The National Nuclear Security Administration is flying helicopters at low altitudes over the District this week and next in preparation for next month’s inauguration. But the flights are not part of a ...