In case you can't read the caption to this photo (sent to me by a concerned citizen and one that has run in the Press before), it shows a bomb test at Lawrence Livermore National Laboratory's Site 300 in the 1960s. To my knowledge, it's similar to above-ground tests conducted today.
You can see bright tracers of material firing away from the blast at high speed in all directions in all corners of the photo. These are pyrophoric matierials, including Uranium 238 (the so-called depleted uranium) that has been the center of concern and discussion around Tracy lately, since the Lab is likely to use depleted uranium in upcoming tests.
Notice these materials are being hurled into the atmosphere at a great rate of speed and are likely to travel a good distance from the controlled and carefully chosen blast site. Where are they landing? I'm not sure, but seeing actual photographic evidence of harmful materials streaking toward the sky near Tracy gives me one more reason to think bomb testing on the community's doorstep is a bad idea.
If you think so too, there's a City Council meeting Feb. 6 and a hearing Feb. 7 that will deal with Lawrence Livermore's permit that would allow increased testing.