"Over time alpha radiation, electromagnetic waves, or chemicals cause emergence and development of cancer. Using the experience gained, the CIA tested new weapons on the progressive leaders and revolutionaries of Latin America."

http://english.pravda.ru/world/americas/05-01-2012/120158-south_america-0/#sthash.SwvsTTV4.dpuf

See also:

Did Decades of CIA's Ionizing Radiation Testing on Humans Result In Ionizing Radiation Becoming a Directed Energy Weapon?

https://www.reddit.com/r/Gangstalking/comments/3fvj7a/did_decades_of_cias_ionizing_radiation_testing_on/

Ionizing Radiation Dosimeter Apps for Android and Apple

https://www.reddit.com/r/Gangstalking/comments/3ftrot/ionizing_radiation_dosimeter_apps_for_android_and/

r/gangstalking wiki has information on Android apps, hand held meters and spectrum analyzers to measure nonionizing electromagnetic energy weapons.