Not good. Looks like the attack originated in Ukraine.
From the link:
Three Web sites belonging to the U.S. Department of the Treasury have been hacked to attack visitors with malicious software, security vendor AVG says.
AVG researcher Roger Thompson discovered the issue Monday on three Web domains associated with the home page of the U.S. Bureau of Engraving and Printing. As of late Monday, all three Web sites were still actively serving malicious software and the Bureau of Engraving and Printing Web site should be avoided until it’s clear that they’ve been cleaned up, Thompson said in an interview via instant message.
Although the Treasury Department could not be reached for comment, IT staff there appear to be aware of the problem. On Tuesday morning, all three sites had apparently been taken offline and were returning a “page not found” error.
According to Thompson, hackers had added a small snippet of virtually undetectable iframe HTML code that redirected visitors to a Web site in the Ukraine that then launched a variety of Web-based attacks based on a commercially available attack-kit called the Eleonore Exploit pack.