In most major airports the scanners have largely been replaced by millimeter-wave scanners, which produce less graphic images, but the backscatter X-ray machines are still in use in smaller security operations. More than 600 comments have already been publicly submitted to the TSA and the forum will be open until June 24th at 11:59 PM EST. So far, commenters are mainly highlighting privacy, civil rights and health concerns. One anonymous commenter noted that:
Kinja is in read-only mode. We are working to restore service.