The U.S. military built a magnet-powered rifle, called a rail gun.
No, I have not taken an EMF sensitivity test to determine my sensitivity to electromagnetic fields.
The first EMP was observed accidentally in a US high altitude nuclear test series over the pacific. Small hydrogen bombs were launched on rockets from Johnston Island into the ionosphere and detonated. The first test in the series produced an EMP that blew out most of the electric grid in Hawaii. Each test in the series also produced a new radiation belt in space and auroras. One test delayed a US Gemini flight, because it would have flown through the new radiation belt. If you want more details watch the video "The Rainbow Bombs".
The test has no harmful effects.
No, there is not a name for the test paramedics give you when they take your pulse. It is simply a routine check-up on your vitals. and to make sure you weren't dying.
It's something they have to specifically test for, but the military doesn't (yet) test for it.
SPO2 or pulse oximetry
Yes. In fact, the heart rate is specifically monitored to know when to stop the stress test.
You cannot accurately check Coumarin level by taking pulse! You need a blood test. Warfarin thins the blood.
You won't be in the Military anymore.
Pulse oximeter
The test has no harmful effects.
Go in for the test "clean".