Why did Thanos send Loki to Earth?

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Tags

1. #wants
2. #several
3. #earth
4. #stones
5. #gives
6. #because
7. #actually
8. #chitauris
9. #stone
10. #against
11. #fight
12. #infinity
13. #thanos
14. #return
15. #space
16. #tesseract