The competition is reached through www.25yearsofcnn.com. To enter the competition, participants are asked to describe in no more than 25 words which news event that changed our world from 1980-2005 they believe has been the most significant, and why.

Additional features on the site include CNN Firsts and Facts that looks at some of the network's unique achievements such as being the only channel to report from Baghdad on the night the Gulf war began in 1991, or the first international channel to break the news of the death of Diana and the tsunami that struck South Asia last December.

Another feature,'25 Years of Ground Breaking News', highlights striking and memorable news landmarks such as the discovery of the HIV virus, the fall of the Berlin Wall or the release of Nelson Mandela.

The competition is open to residents of India, Australia, Hong Kong, Japan, Korea, Malaysia, New Zealand, Philippines, Singapore and Taiwan and is in association with Millennium and Copthorne Hotels.