If the risk of a near-miss becomes too high, it remains to be seen whether we will rely on the know-how of Bruce Willis’ bottom drillers or rather consider a scientific approach to this asteroid.
In 2007, more than 100 teams from 25 countries presented their project to the Planetary Society and the winner could be chosen by NASA and ESA who will jointly develop their project. Among these is the construction of a huge magnet that would attract the asteroid and move it far enough out of its path to avoid any risk of collision. One can also strike Apophis with relatively massive space probes in order to gradually deviate from its trajectory.
In both cases, if we do it early enough (before 2025), a displacement of less than 1 ° would prevent a catastrophe.
Launching rockets equipped with missiles with nuclear warheads or loaded with atomic bombs to try to break the asteroid is excluded due to the risk of accidents and the fact that Apophis is all the same an iron object, very dense and resistant.