Canon, the worldwide market leader in digital cameras, celebrates the 20th anniversary of its top-selling EOS single lens reflex camera system by announcing the EOS-1D Mark III Digital SLR, the world's fastest digital SLR camera.
A. An anterior cruciate ligament, or ACL, injury is a tear in one of the knee ligaments that joins the upper leg bone with the lower leg bone.The ACL keeps the knee stable.our ACL can be injured if your knee joint is bent backward, twisted, or bent side to side. The chance of injury is higher if more than one of these movements occurs at the same time. Contact (being hit by another person or object) also can cause an ACL injury. An ACL injury often occurs during sports.
A PCL injury is a sprain â a stretch or tear of the ligament. PCL sprains are classified as follows. 1  Grade I: a mild injury that causes only microscopic tears in the ligament.  Grade II (moderate): The PCL is partially torn, and the knee periodically gives out when you stand or walk.