Thwarted by the letter N and by the U.S. government

To continue my thwarted by series:

• Today I was thwarted by the N on the keyboard in an instructional session.  Unfortunately there is an N in my University Identification, so I had a bit of difficulty getting where I needed to go in the demonstration.  The N was sticky!
• This afternoon, I did a session entitled Tips and Tricks for Library Researchers.  My second tip was to use the Library of Congress classification codes to locate materials.  Unfortunately their web site is down: http://www.loc.gov/home2/shutdown-message.html.  Later I tried to do a search on PubMed, which was also affected by this shutdown, but to a lesser extent.