commander-in-chief

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Photon (Wikipedia) A photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) ’light’) is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force. Photons are massless particles that always move at the speed of light when in vacuum. The photon belongs to the class of boson particles.

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president of the United States
According to Article II, Section 2, Clause I of the Constitution, the president of the United States is “Commander in Chief of the Army and Navy of the United States, and of the militia of the several States, when called into the actual Service of the United States.”

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Commander-in-chief (Wikipedia) A commander-in-chief or supreme commander is the person who exercises supreme command and control over an armed force or a military branch. As a technical term, it refers to military competencies that reside in a country’s executive leadership, a head of state, head of government, or other designated government official.