http://www.washingtonpost.com/realestate/whos-responsible-when-a-tree-falls/2012/11/02/feece3d6-21c7-11e2-8448-81b1ce7d6978_story.html
This is a good article.
http://www.washingtonpost.com/realestate/whos-responsible-when-a-tree-falls/2012/11/02/feece3d6-21c7-11e2-8448-81b1ce7d6978_story.html