How to unlock locked file in TFS

Just solved a problem.

Imagine some bad guys left your team and did not check in their files.
So you cannot deal with them anymore from Visual Studio.

Here is great explanation of how to rescue:
http://blogs.msdn.com/rimuri/archive/2006/03/06/544686.aspx

Also - description of TFS command-line tools you'll surely need:
http://blogs.msdn.com/buckh/articles/CommandLineSummary.aspx