Humayun tomb being illuminated in blue on the occasion of World Autism Awareness Day (WAAD) on Tuesday March 02, 2013. Six historical monuments in the Capital were illuminated in blue light as part of an initiative to raise awareness about autism. The monuments that were lit up are Qutub Minar, Humayun's Tomb, Safdarjung Tomb, Jantar Mantar, Purana Quila and Red Fort. Photo Credit: Indian Photo Agency (InPA)