 Complete the following phrase:  On 4 December 1979 Kirpichenko arrived in Kabul, in Afghanistan, with a group of officers of the Soviet Airborne Forces, having been sent by KGB chairman Vladimir Kryuchkov to plan for the removal of Hafizullah Amin, the sitting Chairman of the Presidium of the Revolutionary Council of Afghanistan. He took charge of the intelligence officials in the country in preparation for 