Every year, hundreds of professional beekeepers forklift their wooden hives onto 18-wheel semis, strap down the loads, and head out on the highway.

Across the country - from the Imperial Valley in California to the Florida panhandle and the hills of Maine – farmers rely on honeybees to pollinate crops worth $15 billion every year.

But parasites, pesticides, and modern agricultural practices are making it harder and harder for beekeepers to keep their bees alive, and the crisis could affect what shows up on all of our dinner tables.