Gary McKinnon. Gary McKinnon was known by his Internet handle, âSolo.â Using that name, he coordinated what would become the largest military computer hack of all time. The allegations are that he, over a 13-month period from February 2001 to March 2002, illegally gained access to 97 computers belonging to the U.S. Armed Forces and NASA.
The atrioventricular valves of the heart are important in preventing backflow. The mitral valve prevents backflow into the left atrium, and the tricuspid valve prevents backfl â¦ ow into the right atrium.
1 When the left ventricle contracts, the aortic valve opens. This allows blood to flow out of the left ventricle and into the aorta.  When the heart relaxes between contractions, the aortic valve closes. This prevents blood in the aorta from returning to the left ventricle.