March 16, 2011 at 1:03 PM ET
In an effort to maximize the Internet bandwidth needed for Japan recovery operations, the U.S. military has temporarily blocked its personnel from accessing 13 websites, including YouTube, Amazon and ESPN.
CNN obtained an e-mail (confirmed by Strategic Command spokesman Rodney Ellison) that explains the block as "temporary in nature and may increase or decrease in the size and scope as necessary," and that this action is in tandem with Japan relief efforts. "We are trying to make sure we are giving them as many avenues and as much support as we can."
Ellison told CNN that the sites weren't chosen because of content, but because of their high bandwidth mainly because of large video files.
The block, which began Monday, is being implemented across the Department of Defense's .mil computer system.
Besides YouTube, Amazon and ESPN, the other blocked sites are:
More on Japan: