World AIDS Day is December 1st each year and serves as an opportunity for people around the world to unite in the global fight against HIV and AIDS.

An estimated 33.3 million people worldwide have HIV, and between 1981 and 2007, more than 25 million people died from the virus, according to the World AIDS Day website. This makes it one of the most destructive pandemics in history.

For this year’s World AIDS Day, we are posting videos from AIDS/LifeCycle 10, a fundraiser bike ride from San Francisco to Los Angeles that raised $14 million – the largest amount raised for HIV/AIDS from a single event. SheWired’s Tracy E. Gilchrist and Boo Jarchow joined 2,500 cyclists and 600 roadies on the 545-mile journey in June of 2011.

Check out the videos from the frontlines of the battle against AIDS during ALC 10 below: 

Days 1-3 - Kicking Off The Fun:

Days 1 & 2 - San Francisco to King City:

Days 4-6 - Red Dress Day and The Last Leg:

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