As scene from The Regeneron International Science and Engineering Fair
The Regeneron International Science and Engineering Fair begins Sunday in Dallas.
  • The world's largest high school science fair starts Sunday in Dallas, Texas.
  • More than 1,600 students from more than 60 countries will compete for prizes worth almost $9 million.
  • Some students are entering projects aimed at tackling the problem of school shootings.

Forget the days of volcanoes made from baking soda and vinegar.

At the world's largest science fair, which starts Sunday in Dallas, there are projects centered on clean energy, climate change, artificial intelligence — and school shootings.