NASA is Trying to Capture an Asteroid

NASA has always wanted to catch an asteroid but thought it was too expensive and therefore never tried. But now they found out that capturing an asteroid may not be as difficult or expensive as NASA had thought.

They are currently planning out a bold mission to snatch an asteroid and drag it to a stable orbit near Earth, where it could be visited repeatedly by astronauts for scientific purposes. 

The best way they think to do this is to chase down one of the "mini-moons" that go around our planet temporarily before going back off into deep space.