Comment Re:Homeland Security != Information Security (Score 4, Informative) 276
I am assuming you mean S&T, not DHS overall.
Science & Technology is the primary research and development arm of the Department - we're different from other science-related organizations like NIH, NSF, etc., in that our work must have clear line-of-sight to security applications. Not to say we don't have some focus in the basic sciences, but rather to say that it's only about a 20% focus. We also have a portion of our research budget that goes to high-risk things that will probably fail. Thankfully our leadership hear in S&T understands that in science, you need to have at least some fraction of your research portfolio 'on the edge' - that's where you find the home-runs, and not always in the 'safe' stuff. This is hard to defend though, since Congress doesn't hearing that you're spending research dollars on 'risky' projects expected to fail.
In addition to research, the 'T' in S&T means that we develop technologies for the first responders and other users (i.e., interoperable radios and communication, Chemical and Biological detectors, other miscellaneous cool widgets, etc.)
You may also (correctly) guess that any significant effort to prevent terrorist use of WMD requires top-notch scientific and technical expertise as well, so we do a lot of WMD-related work. Hope that helps.