Before the study, participants will have a complete exam including blood tests and a chest x-ray. A mammogram and a sonogram of the breast and armpit will be obtained to record tumor size. Small metal clips will be inserted into the breast to mark the tumor if the tumor is shrinking rapidly in response to therapy; in this way, if the tumor disappears after drug treatment, the surgeon can still remove the tissue around the tumor. Sonography of the liver or a CT scan of the abdomen will also be done. In some participants, 3-4 samples of the breast that has tumor will be taken. The samples will be taken using a biopsy needle. An echocardiogram (heart function test) will be done on every participant at baseline. An echocardiogram will be done after finishing their Taxol chemotherapy and another one after finishing FEC chemotherapy. Copies of the echocardiogram tapes may be sent to the sponsor for review. Women who are able to have children will have a pregnancy test.