Title text:
Detectives say the key to tracking down the source of the kites was a large wall map covered in thumbtacks and string. 'It's the first time that method has ever actually worked,' said a spokesperson.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3121/
Not hold onto enough kites to circle the Earth kind of strong. Fishing line strength is measured in lbs, and not a lot of them. Fish can break it after all.