MYKOLAIV, Ukraine - The pickup truck bounced along a rutted dirt track until it came to a stop on a sandy knoll. It was almost midnight. A half-moon revealed waves lapping at a small beach as four Ukrainian soldiers - drone hunters - stepped out of the truck and waited for the sound.
Boom. A powerful explosion echoed over the city of Mykolaiv - signaling another Russian air attack was underway. Then came another rumble and sirens blared.