Donkeys and Mules

12345678910
Across
  1. 4. I am a country in Africa
  2. 8. I am a type of horses
  3. 9. I am under training
  4. 10. I am a weapon used for killing
Down
  1. 1. ?
  2. 2. I am launched in the sky
  3. 3. I will explode
  4. 5. I am almost as high as the clouds
  5. 6. You need to pack me
  6. 7. I am a type of transport