https://dsm.forecastinternational.com/2017/05/25/mi-28nm-state-trials-begin/
Mi-28NM State Trials Begin - Defense Security Monitor
Jan 16, 2019 - Russia has begun state trials of the Mi-28NM ‘Night Hunter’ attack helicopter. Tass News Agency reported on May 25, 2017 that state trials of the latest Mi-28...
state trialsdefense securitymibeginmonitor
https://dsm.forecastinternational.com/2019/02/12/russian-naval-air-defense-system-completes-state-trials/
Russian Naval Air Defense System Completes State Trials - Defense Security Monitor
Feb 12, 2019 - State trials of the Poliment-Redut naval air-defense system have concluded.
naval air defensestate trialsrussiansystemcompletes