April is Autism Awareness Month and tomorrow, April 2, Autism Awareness Day. Autism Speaks, the largest autism science-and-advocacy organization in the U.S., estimates that 67 million people worldwide live with the condition, which remains the fastest-growing developmental disability in the world -- affecting 1 out of every 110 children. Recent efforts in early detection and educational intervention have shown encouraging results, bringing a measure of hope to often difficult family situations. Relatives and caretakers of those with autism will tell you that it can be both the most frustrating and the most rewarding work of their lives. My only brother is autistic, and my family and I know these difficulties and rewards well. He's an adult now, living happily in a group home much like the one featured in the final four photos below by Kevin Wellenius. For further information, visit advocacy groups Autism Speaks or Autism Society. Many thanks to the families and photographers who are sharing their personal, intimate photos here today.