Texarkana residents noticed thick brown smoke rising into the sky this morning in a towering pillar that nearly blotted out the sun. But what was on fire?

I followed the smoke this morning until I reached Mandeville, Ark. on the outskirts of Texarkana, just north of Interstate 30.

There I found the source of all that smoke. As dried brush is burned off to clear way for fresh crops, the flames rage on, lapping at the dead foliage until all that is left is rich brown soil.

Watch the full report below.