Recession proof trades?

http://www.businessweek.com/bwdaily/dnflash/content/jan2009/db20090116_786365.htm

So it appears, not all is gloom and doom in a recession. A very nice article from BusinessWeek about recession unaffected jobs. Some of them are quite logical, trades relating to repair tend to perform better as people resort to more reuse, so does training and education.