Ronald Brock doesn't get his Christian message out via Facebook or Twitter. He isn't plugged into social media.
Instead, he drives around the country in a 1987 Toyota motor home that has more than 400,000 miles on it. The sides and rear of the vehicle are covered in hand-painted signs that rage against abortion and homosexuality and encourage people to repent.
To connect with a particular audience at a certain event, he pulls out one of dozens of painted signs he carries in the rear of the vehicle and replaces an existing one. The signs, which have similar messages, remain attached with bolts and screws.
Brock, 74, is a solo traveler and missionary who calls the road his home and sleeps in his motor home.
He has been to six political conventions, including the Republican National Convention in Tampa. Before arriving in Tampa, he was in Washington, D.C., and before that he was in Detroit at a classic car event and parade.
After Tampa, he's headed to the Democratic National Convention in Charlotte, N.C.
"I wouldn't say I'm protesting as much as witnessing," Brock said.
His crusade began in 1989 when he decided to quit his hairstylist career and join the fight against abortion by joining Operation Rescue.
In 1996, he started driving around the country and reaching out to people at major events. He first drove a van. Now he has moved onto the motor home, which has had a number of repairs, he said.
Brock, who is divorced and doesn't have children, said he does his missionary work 24/7 and does it alone.
"I couldn't do this to the extent I do if I were married," said Brock, who was born in Detroit. "This is a motor home but look inside. There isn't room for two people."