A CyberKnife is a robotic system to direct a carefully aimed beam of radiation to destroy a tumor. Radiation therapy works by hitting the cells with high energy sub-atomic particles. This radiation can damage cells by knocking electrons out of biomolecules. If electrons are removed from the DNA backbone, it causes the breakdown of DNA and the death of the cell. Dr. Rajesh Iyer, radiation oncologist with New Jersey CyberKnife and chairman of radiation oncology at Community Medical Center built this CyberKnife for his son.