![Elon Musk, the billionaire inventor and SpaceX founder, tweeted videos of his rescue submarine that can be used to extract a soccer team trapped inside a Thailand cave. The picture shows the tiny kid-sized submarine simulating maneuvering through a narrow passage. (Photo/Agencies)](http://www.ecns.cn/hd/2018/07/09/368c96f3c1da442c849bbac85c5b7c53.jpg)
Elon Musk, the billionaire inventor and SpaceX founder, tweeted videos of his rescue submarine that can be used to extract a soccer team trapped inside a Thailand cave. The picture shows the tiny kid-sized submarine simulating maneuvering through a narrow passage. (Photo/Agencies)
![A diver tests the tiny kid-sized submarine in a pool in Los Angeles. Musk said the construction will be \](http://www.ecns.cn/hd/2018/07/09/37da69f64acb49399c3d06093e07aa28.jpg)
A diver tests the tiny kid-sized submarine in a pool in Los Angeles. Musk said the construction will be "complete in about 8 hours, then 17-hour flight to Thailand." (Photo/Agencies)
![The production of tiny kid-sized submarine. Musk said the construction will be \](http://www.ecns.cn/hd/2018/07/09/20cd579e76fd4da993cc0b731cafb5b1.jpg)
The production of tiny kid-sized submarine. Musk said the construction will be "complete in about 8 hours, then 17-hour flight to Thailand." (Photo/Agencies)