America is a nation of immigrants whose contributions gave us America, and taught us what it means to be free. This book profiles three pre-1950 medical practitioners and scientists and another nine contemporary professionals (12 profiles); in mini biographies examinging where they came from, and their notable contribution(s) in America.. From Australia's Elizabeth Blackburn who discovered an enzyme in chromosones, to England's George Clowes who worked to establish chemotherapy as a treatment for cancer, to Lithuania's Andrew Schally who studied the growth of nerve cells in cancerous tumors, this book will inspire readers with stories of possibility and grit.and emphasizes how they made our country great. Backmatter includes 4 extra mini-bios of other amazing American citizens who we never think of as immigrants. Note the additional and up-to-the minute resources available at 12StoryLibrary.com: Editor-selected news articles; videos; online resources; teacher resources; live Twitter and RSS feeds - from Amzon