Virtual Radiologic and NightHawk Radiology Merge

Virtual Radiologic and NightHawk Radiology NHWK today announced that they have entered into a definitive agreement under which vRad will acquire all of the outstanding common stock of NightHawk Radiology Holdings, Inc. for $6.50 per share in cash. The offer price represents a premium of 100% over NightHawk's last closing stock price of $3.25 per share. The transaction is valued