Ostorozhno Novosti/Handout via REUTERSSummary Kremlin citadel has extensive anti-drone protections400-plus km journey from Ukraine unlikelyIf launched in Russia, multiple drone types possibleWASHINGTON, May 5 (Reuters) - The drones that crashed over the Kremlin earlier this week probably evaded an extensive number of defenses in and around Moscow, suggesting they might have been launched from inside Russia, U.S.-based drones experts said. "Spoofing" occurs when a counterfeit GPS signal is sent to replace a legitimate one, electronically fooling guidance systems on drones or other devices. "Of all the types of one-way attack drones, the aircraft used in this instance appears to have been a fixed-wing aircraft and among the larger one-way attack drones currently in use or development," said drone expert Dan Gettinger at the Vertical Flight Society, an engineering advocacy group. China, India, Taiwan and Ukraine are among a clutch of nations producing drones of this size and capability, Gettinger said. Gettinger, who published a paper on one-way attack drones on Thursday, said if the aircraft was launched from within Russia, there was a significantly greater number of aircraft capable of carrying out this attack.

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