What does that mean?................
It means he tried to post a photo and the site he linked to blocked it.
Free Tacos for U.S. If Mir Hits Floating Taco Bell Ocean Target - Taco Bell sets 40 by 40 foot target in South Pacific for Mir’s Re-Entry
Source: Taco Bell Corp. Posted Monday, March 19, 2001
http://www.spaceref.com/news/viewpr.html?pid=4152