Amazon S3 images not showing on Linkedin or Facebook status update

I have image URL from Amazon S3 - http://ift.tt/1xuOoJc When I try to share this URL on linkedin status update I do not see image thumbnail

The same with Facebook. But other images work fine. I think that image was not uploaded correctly on S3, but I do not know what is missed.

Could you point me what can be wrong with the image or how I can validated it?