Today, in this article, we are going to share with you Master the Boards (USMLE) Step 2  PDF for free download. We hope that you all find this blog post useful! USMLE STEP 2 CK is typically taken as the second test in a series of three national certifying examinations that are necessary to obtain a license to practice medicine in the United States. Step 2 CK is usually taken between the end of the third year of medical school …