When I was a kid we had a friend who worked at Hanford he used to bring us Zirconium turnings (for fuel rods). It looked like coarse steel wool, you could light it and it burned with a brilliant white light, once it cot started it was impossible to put out. Later when I worked at the Naval weapons center we used it as an incendiary, that area of Japan is pretty much f*cked Cesium has a half life of 30 years.