Do you believe the authors of an European study who assert that "while screening may reduce cervical and colorectal cancer mortality, it's not so for breast cancer"? [BMJ July 28, 2011]

Neither do I.  According to an August 3rd, 2011 [last acccessed 8/7/11] Medscape editorial by Fran Lowry.  The "conclusions of the BMJ study authors have little bearing on, or resemblance to, screening in the United States. Improvements in therapy have, likely, played a role in the decrease in breast cancer deaths, but therapy cannot cure advanced cancers. Early detection via mammography is clearly the major reason for the decrease in deaths in the United States."  [American College of Radiology (ACR)]