A fiery chain-reaction accident on southbound Interstate 65 in Boone County resulted in the death of a man early Thursday morning. At about 5:20 a.m., a semitrailer rolled over just north of the Lebanon exit. A half-hour later, in the resulting back-up, a second semi slammed into the back of a third semi. The second semi exploded into flames, killing the driver. Southbound lanes were closed because of the accidents.