“..potential jurors might fear for their safety because of the nature of the charges..”
This is how things will be in the future when dealing with members of Al-Qaeda. Prosecuters will be hard pressed to find jury members just like in the Al Capone days. His gangsters were mere boy scouts compared to what we have seen so far of the terrorists. There will come a time when family members of prominent politicians will need 24-hour/day protection.
Hey, just like a third-world country! How did that happen? Oh, yeah--you import the third world into your country, don't require citizenship, and - voila! - you're a third-world country!!