Bikes and rallygoers fill Main Street during the annual Sturgis Motorcycle Rally in Sturgis, South Dakota, August 4, 2015. This year marks the 75th anniversary of the rally expected to draw hundreds of thousands of motorcycle enthusiasts from around the world for events throughout the week-long festival, according to organizers. (Photo by Kristina Barker/Reuters)

Chantel Sydnor participates in the annual Sturgis Motorcycle Rally in Sturgis, South Dakota, August 4, 2015. (Photo by Kristina Barker/Reuters)

Revellers participate in the annual Sturgis Motorcycle Rally at The Knuckle Saloon in Sturgis, South Dakota, August 4, 2015. (Photo by Kristina Barker/Reuters)

Daniel Shorts, of Rhode Island, signs his name on a wall at the Stone House Saloon outside of Belle Fourche, South Dakota, while participating in the annual Sturgis Motorcycle Rally in South Dakota, August 5, 2015. (Photo by Kristina Barker/Reuters)

Stephanie Beaver, of Oklahoma, watches bike traffic come in to the Stone House Saloon outside of Belle Fourche, South Dakota, while participating in the annual Sturgis Motorcycle Rally in South Dakota, August 5, 2015. (Photo by Kristina Barker/Reuters)

Rallygoers watch bikes pull up to the Stone House Saloon outside of Belle Fourche, South Dakota, while participating in the annual Sturgis Motorcycle Rally in South Dakota, August 5, 2015. (Photo by Kristina Barker/Reuters)

Kirk Cordes (L), on his horse Lash, direct traffic at the Stone House Saloon outside of Belle Fourche, South Dakota, while participating in the annual Sturgis Motorcycle Rally in South Dakota, August 5, 2015. (Photo by Kristina Barker/Reuters)

Cliff Kling directs traffic at the entrance of the Stone House Saloon outside of Belle Fourche, South Dakota, while participating in the annual Sturgis Motorcycle Rally in South Dakota, August 5, 2015. (Photo by Kristina Barker/Reuters)

Bikers walk along Main Street in downtown Custer while participating in the annual Sturgis Motorcycle Rally in South Dakota on August 3, 2015. (Photo by Kristina Barker/Reuters)

Laurel Rogers (L), with her dog Savior, and Terry Rogers, with his dog Blue, get their canine companions secure before getting back on their motorcycle while participating in the annual Sturgis Motorcycle Rally in Sturgis, South Dakota, August 4, 2015. (Photo by Kristina Barker/Reuters)

M.J. Gunderson (C), follows his 4-year-old daughter Fynn Petri-Gunderson, both of New Town, North Dakota, as she rides a toy motorcycle during the annual Sturgis Motorcycle Rally in Sturgis, South Dakota, August 4, 2015. (Photo by Kristina Barker/Reuters)

The Hellfighters Christian motorcycle club which provides ministry and worship services to rallygoers at the annual Sturgis Motorcycle Rally is pictured in Sturgis, South Dakota, August 3, 2015. (Photo by Kristina Barker/Reuters)

Mike Shannon, of Bloomington, Minnesota, watches the traffic roll through downtown while participating in the annual Sturgis Motorcycle Rally in Sturgis, South Dakota, August 4, 2015. (Photo by Kristina Barker/Reuters)

Dave Johnson, of Michigan, takes a break on his bike parked on Main Street while participating in the annual Sturgis Motorcycle Rally in Sturgis, South Dakota, August 4, 2015. (Photo by Kristina Barker/Reuters)

An unidentified man hands out bibles while participating in the annual Sturgis Motorcycle Rally in Sturgis, South Dakota, August 4, 2015. (Photo by Kristina Barker/Reuters)

Bikers cruise along Main Street in downtown Custer while participating in the annual Sturgis Motorcycle Rally in South Dakota on August 3, 2015. (Photo by Kristina Barker/Reuters)

Custer State Park assistant buffalo herd manager Doug Cox monitored motorcycle traffic from horseback during the annual Sturgis Motorcycle Rally on August 3, 2015. (Photo by Kristina Barker/Reuters)

Mitch McLain, dressed as General George Custer, greets bikers entering downtown Custer during the annual Sturgis Motorcycle Rally in South Dakota, August 3, 2015. (Photo by Kristina Barker/Reuters)

Dog Silver, Deb Kenobbie, of Iowa, and Roger Kenobbie, of Kimball, South Dakota, watch bike traffic along Main Street in downtown Custer, South Dakota as bikers participate in the annual Sturgis Motorcycle Rally on August 3, 2015. (Photo by Kristina Barker/Reuters)

Local Charles Boyles watches the traffic along Main Street in downtown Custer with his dog Buddy during the annual Sturgis Motorcycle Rally in South Dakota on August 3, 2015. (Photo by Kristina Barker/Reuters)