21 dead in villages in northern Nigeria

Abuja, Accra, Aug. 7: Nigerian police said on July 7 that some villages in Kaduna Prefecture in northern Nigeria were attacked by unidentified gunmen, killing 21 civilians and injuring many people. Police said the attack occurred from the evening of 5th to the morning of 6th. Police then strengthened police force in the area of attack to prevent similar incidents from happening again. In recent years, northern Nigeria has been attacked by gunmen, causing many soldiers and civilians to die. The Nigerian military said it was launching an operation to crack down on militants. How to implement the most difficult space mission in history? ——Interview with Li Qing, general deputy director of chang’e-5 detector, No.5 Institute of Aerospace Science and Technology Group