Cyberwarfare in the United States is the United States Cyber Commands military strategy of proactive cyber defense and the use of cyberwarfare as a platform for attack. The United States Department of Defense sees the use of computers and the Internet to conduct warfare in cyberspace as a threat to national security. The Joint Forces Command issued a statement: Cyberspace technology is emerging as an instrument of power in societies, and is becoming more available to a country's opponents, who may use it to attack, degrade, and disrupt communications and the flow of information. With low barriers to entry, coupled with the anonymous nature of activities in cyberspace, the list of potential adversaries is broad. Furthermore, the globe-spanning range of cyberspace and its disregard for national borders will challenge legal systems and complicate a nation's ability to deter threats and respond to contingencies. The five pillars is the framework for the United States military strategy for cyberwarfare. The first pillar is to recognize that the new domain for warfare is cyberspace similar to the other elements in the battle space. The second pillar is proactive defenses as opposed to passive defense. Two examples of passive defense are computer hygiene and firewalls, which detect approximately 70 to 80 percent of cyber attacks. The balance of the attacks requires active defense using sensors to provide a rapid response to detect and stop a cyber attack on a computer network. This would provide military tactics to hunt down and attack an enemy intruder. The third pillar is critical infrastructure protection (CIP) to ensure the protection of critical infrastructure. The fourth pillar is the use of collective defense, which would provide the ability of early detection and to incorporate them into the cyberwarfare defense structure. The fifth pillar is to maintain and enhance the advantage of technological change. This would include improved computer literacy and increasing artificial intelligence capabilities.

Gasoline Engines

Gasoline engines have the advantage over diesel in being lighter and able to work at higher rotational speeds and they are the usual choice for fitting in high-performance sports cars. Continuous development of gasoline engines for over a hundred years has produced improvements in efficiency and reduced pollution. The carburetor was used on nearly all road car engines until the 1980s but it was long realized better control of the fuel/air mixture could be achieved with fuel injection. Indirect fuel injection was first used in aircraft engines from 1909, in racing car engines from the 1930s, and road cars from the late 1950s.

Gasoline Direct Injection (GDI) is now starting to appear in production vehicles such as the 2007 BMW MINI. Exhaust gases are also cleaned up by fitting a catalytic converter into the exhaust system. Clean air legislation in many of the car industries most important markets has made both catalysts and fuel injection virtually universal fittings. Most modern gasoline engines are also capable of running with up to 15% ethanol mixed into the gasoline - older vehicles may have seals and hoses that can be harmed by ethanol. With a small amount of redesign, gasoline-powered vehicles can run on ethanol concentrations as high as 85%. 100% ethanol is used in some parts of the world (such as Brazil), but vehicles must be started on pure gasoline and switched over to ethanol once the engine is running. Most gasoline engines cars can also run on LPG with the addition of an LPG tank for fuel storage and carburetion modifications to add an LPG mixer. LPG produces fewer toxic emissions and is a popular fuel for fork lift trucks that have to operate inside buildings.