¡¡ THIS WEBSITE HAD A SECURITY INCIDENT !!
(Check out more like this in: PwnedWebsites.com)

http://www.sem.dol.gov

around May del 2013 was victim of:

serving malicious code
like many other websites:

Source: https://www.alienvault.com/open-threat-exchange/blog/us-department-of-labor-website-hacked-and-redirecting-to-malicious-code