Bombs go off near finish line of Boston Marathon

What do you guys think of this? Sorry it's in spanish.

http://traslaverdad.com/noticias/montaje...de-boston/

Short story, people took pics of what seems to be 3 people using make-up to make an amputee look like an explosion victim. Why? To create a shocking scene for the media. I'm at work so I haven't been able to do much research on the conspiracy claims, but I found it quite interesting.