<human>:  Was being a mail carrier considered one of the most dangerous jobs?
<bot>: Yes, being a mail carrier was considered one of the most dangerous jobs. The Pony Express was one of the first mail carrier services. The Pony Express operated form 1860 to 1861. Pony Express riders would have to travel hundreds of miles on horse back through extreme weather and terrain. The Pony Express sought to hire young expert horse riders willing to risk death. So being a mail carrier was considered very dangerous.