Having read some additional sources, the justification for forcing the three individuals to speak is that they were given immunity from prosecution by the grand jury. This supposedly prevents them from taking the fifth, because they can't incriminate themselves. That smells like an attempted end run around the constitution.<p>What immunity doesn't address is the individual's first amendment right to freedom of speech. Freedom of speech must include the freedom to remain silent. Nothing in the constitution gives the government the power to compel expression.<p>Fourth amendment protections against search and seizure should apply as well. The government is trying to force these people to provide the contents of their minds. Again, there is no constitutional justification for this.<p>The constitution sets out strict limits on government power. This use of the grand jury system is a clear violation of those limits and a moral outrage.