Perspective Correction in Lightroom 3
www.lightroomsecrets.com/blog/2010/12/perspective-correction-in-lightroom-3
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Easily straighten out architectural photos in #Lightroom 3 with help from the new Lens Corrections panel: