I don't know what happened to the /r/worldnews post, but that subreddit's rules do say that it's for non-US sources and news. Also, that post linked to a Gawker site, which for many is reason enough to kill it.
http://www.reddit.com/r/worldnews/comments/1cerrp/boston_mar...
During disasters such as this, I appreciate reddit's scale (and diversity) for up-to-date information in the comments.