MAINZ, Germany — Authorities in Germany arrested 25 people on Wednesday who are suspected of planning to violently overthrow the government in a far-right extremist plot. More than 3,000 police officers, including special forces, made 130 early morning searches across 11 of Germany's 16 federal states in one of the biggest counterterrorism operations in the country's history. Suspects from the so-far unnamed group include a nobleman with a historic royal title and various armed forces veterans. It is centered on the so-called Reichsbürger, or Reich Citizens, movement which is motivated by conspiracy theories about the role and legitimacy of the...