Great use of bioengineering technology

I personally don't think bio-engineered food is good for anything except big agriculture businesses, but I do believe the technology can be used for the better good. Here's an example of using bioengineering to correct a mistake made decades ago (accidentally importing a fungus which wiped out the eastern chestnut trees). The best part is - this doesn't kill the imported fungus - it just changes things enough so the fungus can live - but so can the trees:

Click here for the story.