NAIROBI, Oct. 11 (Xinhua) -- The Armed Forces Appreciation Motocross Championship competition held at Busiika Motocross Arena in Luwero district, central Uganda, Oct. 6, 2019.

Motocross riders wait to be flagged off at the starting point of the race during the Armed Forces Appreciation Motocross Championship competition at Busiika Motocross Arena in Luwero district, central Uganda, Oct. 6, 2019. (Xinhua/Hajarah Nalwadda)

Uganda Team Captain Maxime Van Pee (Front) competes with other participants in the second race during the Armed Forces Appreciation Motocross Championship competition at Busiika Motocross Arena in Luwero district, central Uganda, Oct. 6, 2019. (Xinhua/Hajarah Nalwadda)

Thomas Vongsana hits the sky during the MX1 race as the crowd cheers him during the Armed Forces Appreciation Motocross Championship competition at Busiika Motocross Arena in Luwero district, central Uganda, Oct. 6, 2019. (Xinhua/Hajarah Nalwadda)

Ugandan motocross rider Ismail Mukiibi races his first lap during the Armed Forces Appreciation Motocross Championship competition at Busiika Motocross Arena in Luwero district, central Uganda, Oct. 06, 2019. (Xinhua/Hajarah Nalwadda)

American motocross rider Ryan Surratt flies his bike as the crowd cheers him up during the Armed Forces Appreciation Motocross Championship competition at Busiika Motocross Arena in Luwero district, central Uganda, Oct. 06, 2019. (Xinhua/Hajarah Nalwadda)

Kerim Fitz Gerald is in the lead as other bikers follow him during the MX1 race for Armed Forces Appreciation Motocross Championship competition at Busiika Motocross Arena in Luwero district, central Uganda, Oct. 06, 2019.(Xinhua/Hajarah Nalwadda)

Jurncture George being helped to push away his motorbike from the racing track after getting a mechanical problem during the Armed Forces Appreciation Motocross Championship competition at Busiika Motocross Arena in Luwero district, central Uganda, Oct. 06, 2019. (Xinhua/Hajarah Nalwadda)

Dave Abbing (forward) and Kerim Fitz Gerald (behind) competing during the MX1 race for Armed Forces Appreciation Motocross Championship competition at Busiika Motocross Arena in Luwero district, central Uganda, Oct. 06, 2019. (Xinhua/Hajarah Nalwadda)

Motocross riders are in action of flying their motorbikes during the MX1 race as the crowd cheers them during the Armed Forces Appreciation Motocross Championship competition at Busiika Motocross Arena in Luwero district, central Uganda, Oct. 06, 2019. (Xinhua/Hajarah Nalwadda)■