A police officer holds a gun as firefighters unload an airplane after its arrival at the Vaclav Havel Airport in Prague, Friday, March 20, 2020. The airplane brought medical aid and protective materials against coronavirus from China. (Michal Kamaryt/CTK via AP) less A police officer holds a gun as firefighters unload an airplane after its arrival at the Vaclav Havel Airport in Prague, Friday, March 20, 2020. The airplane brought medical aid and protective materials against … more Photo: Michal Kamaryt, AP Photo: Michal Kamaryt, AP Image 1 of / 8 Caption Close Image 1 of 8 A police officer holds a gun as firefighters unload an airplane after its arrival at the Vaclav Havel Airport in Prague, Friday, March 20, 2020. The airplane brought medical aid and protective materials against coronavirus from China. (Michal Kamaryt/CTK via AP) less A police officer holds a gun as firefighters unload an airplane after its arrival at the Vaclav Havel Airport in Prague, Friday, March 20, 2020. The airplane brought medical aid and protective materials against … more Photo: Michal Kamaryt, AP China, on virus PR offensive, sends masks and experts abroad 1 / 8 Back to Gallery BEIJING (AP) — As the…