Question
I had noticed the other day that my neighbors pine tree had completely turned brown so I was worried and started watching mine and within a few days 4 of my 8 trees in the back had also turned completely brown.  Do you have any idea what this could be?  I have looked and do not see any sign of Beatles.

Answer
It could be several things from bark beetles to a root disease. Without looking at the trees it would be difficult to say. I would suggest that you call the local office of the State Forestry agency and ask one of their Forester to come out and take a look. They will be able to tell you what is causing this and provide a treatment recommendation.