Docetaxel plus gemcitabine is an active combination in the salvage treatment for metastatic breast cancer. Administered every two weeks, this combination has a favorable toxicity profile, and promising activity in > 1st line treatment for metastatic breast cancer. Recently, initial therapy of metastatic breast cancer with paclitaxel plus bevacizumab demonstrated prolonged progression-free survival, as compared with paclitaxel alone. This study will evaluate the addition of bevacizumab to a biweekly regimen of docetaxel and gemcitabine in the salvage therapy for metastatic breast cancer.