"Jeff Rigby" wrote in message
. ..
Am I being paranoid if I fear that one of the harder to get components of
a suitcase bomb is detected on airplanes traveling from Russia to England.

If you think you're paranoid you probably are.
On a technical note; I once owned a Fountain with highly-modified 30 hp
Evinrude that used Polonium 110 and methane as fuel. The Polonium was
delivered to the dock in a suitcase and the methane was derived from BS. I
was able to use a flux capacitor as a neutron reflector thereby saving the
weight of a lead shield.