Consider the following statements:

1. The asteroid Apophis, discovered in 2004, is expected to have its closest flyby with Earth in 2029.

2. Thousands of asteroids enter Earth’s atmosphere every day, but most are small and burn up due to atmospheric friction.

3. NASA’s DART mission successfully altered the trajectory of the asteroid Dimorphos using the kinetic impactor technique.

How many of the above statements are correct?