This is a prospective, observational study designed to look at ultrasound images of the joint at baseline and over time, and investigate whether there is a correlation between ultrasound images and progression of disease. The researchers wish also to see if ultrasound can be used as a tool to predict progression of Rheumatoid Arthritis in patients with early disease who have not taken biologics therapy. In addition, the researchers wish to investigate whether peripheral blood "biomarkers"can be identified that predict the progression of erosive disease in early rheumatoid arthritis, with the intention of testing the most promising biomarkers in future clinical trials.