Inside Ukraine's secret drone campaign destroying sites deep in Russia

Viktor Lysenko/Business Insider

UNDISCLOSED LOCATION, Ukraine — At a secret warehouse, in the darkness of night, masked specialists from Ukraine's military intelligence service GUR drill and hammer as they assemble a line of 15-foot-long aircraft. These are Ukrainian Liutyi long-range kamikaze drones, carrying explosive payloads of up to 150 pounds and capable of traveling nearly 1,300 miles. Later that night, they will be launched toward targets inside Russia.