More than 80 iconic landmarks across 13 countries will illuminate across each time zone, to help promote awareness of the ongoing fight against the AIDS epidemic by turning red to mark World AIDS Day which happens on December 1. The UN said on November 23 that the number of new cases of HIV/AIDS has dropped by about one-fifth over the past decade but millions of people are still missing out on major progress in prevention and treatment. About 33.3 million people worldwide were living with the HIV virus that causes AIDS at the end of last year -- about 100,000 less than in 2008.