Odds are they'll require all devices to go through the scanners, because officially, they cause no damage.

From the [TSA's Packing Tips page][1]:

> TSA will screen any "Carry-on" baggage that will fit through the x-ray
> machine;

However, looking at that, there are a few points that some stuff could get damaged:


> Don't put film in your checked baggage, as the screening equipment
> will damage it.

And they have a way around inspection by x-ray for those sensitive items:

> Put all undeveloped film and cameras with film in your carry-on
> baggage.  **If your bag will pass through the X-ray machine more than
> five (5) times ask for a hand inspection to prevent damage.**

So hand inspections are indeed possible.

Finally, IF by some horrible luck, you get something damaged, [they have a page on how to handle this (claims etc)][2].  I link to TSA,  but assume most screening organisations around the world will be similar.


  [1]: http://www.tsa.gov/traveler-information/packing-tip
  [2]: http://www.tsa.gov/traveler-information/claim-forms