action is taking place in the senate where a bipartisan support from senator rockefeller and senator hutcheson, a bill actually proposes a solution that we strongly support. >> jack brown, do you agree with the necessity of the d-block? >> yes, i do. our biggest concern and public safety is reliability. we just feel the public safety committees should have control over the d-block and be able to set it up and not necessarily have to depend on outside carriers. >> also joining us this tim sparks, homeland security reporter for congressional quarterly. >> looking at how long this has seemingly taken, everybody seems to think it is a good idea to have interoperability in communications. what are the obstacles? what are the problems? why hasn't this happened yet? but i will tell you my view. that is that there are people who believe that there are different ways of approaching this solution that the way that public sector believes. we have growing bipartisan support, both in the house and the senate to support what we believe is the right solution, and that is basically a language that is then sen