No further arrests related to the Krar case have been announced.
The Krar case exemplifies another of the reasons that some people express concern about whether law enforcement is focused enough on the radical right rather than on foreign terrorist groups or radical environmentalists like the Earth Liberation Front.
The FBI lists right-wing extremists as a lesser domestic terror threat than the ELF, even though that group has never killed a single person. ELF has caused more than $100 million in property damage over the past decade, according to the FBI.
Bureau Director Robert Mueller, testifying before the Senate Intelligence Committee recently, mentioned the threat from white supremacist groups, the right-wing Patriot movement and anti-abortion extremists. But he ranked higher the threats from radical environmentalists, anarchists and black nationalist groups.
Congressional Quarterly reported that a document it obtained from the Department of Homeland Security "appears to be an internal list of threats to the nation's security," but does not list right-wing groups at all.
"I think that's a grotesque mistake," Potok said. "It's not like the threat of another McVeigh has gone away."
The DHS did not reply to requests for comment on the report.
Perhaps the most disturbing thing about the Krar case is that had a package containing false identification he was trying to send to someone in New Jersey not been mistakenly delivered to a man in New York, and had that man not unthinkingly opened it and turned it over to police, Krar could still be on the loose, with his chemical weapon materials and his arsenal of guns and bombs.
"All the more reason for DHS to be aware of the domestic terror threat," Potok said.
The lack of publicity the FBI and Justice Department gave the case led some domestic terrorism experts to believe that law enforcement is not taking the threat from the radical right seriously enough.
"Just because Oklahoma City happened 10 years ago, doesn't mean it's unlikely to happen again," said Dan Levitas, author of "The Terrorist Next Door." "One would be foolish not to expect it. Unfortunately, the law enforcement community is so singularly focused on terrorists from abroad and don't seem to acknowledge that the majority of terrorist acts perpetrated on American soil have come from the radical right."
It is not that they mean to diminish the need to defend the country from al Qaeda, but that they believe the attention focused on foreign terrorists should not come at the expense of the fight against potential terrorists within the United States.
"I certainly believe that al Qaeda is a greater threat to commit a major act of terrorism in the United States," Levin said. "That being said, the domestic groups have the greater ability to slip under the radar and get things done."
While Krar represents the extreme in terms of the amount of firepower he had put together, his case is by no means unique.
There is, of course, Rudolph, who killed one person and injured more than 100 with a bomb at the Olympic Park in Atlanta in 1996 and killed a police officer and injured a nurse in an abortion clinic bombing in Birmingham, Ala., in 1998. He pleaded guilty to the bombings on Wednesday.
And there are countless others who were arrested before they could spill any blood.