1-
The rock that passed tangentially with the earth and in fact within
the atmsophere of the earth at a height of about 27 km which is a distance less than that of the communication satellites of the earth; that rock passed with an extreme speed and so it did not impact the earth.
Had it changed its line of movement a little bit, it would have impacted the earth causing a tremendous harm to people of any city and the surrounding areas.
2- The fireballs that struck the Chellyabnisk city and the Oral mountains; these fireballs came all of a sudden and were never expected on the early morning of the day next to the Valentine Day in which all the commandments of God were violated.
Therefore, we should be grateful to God Most Gracious for that He saved us from such catastrophes which cannot averted even by the haughty American agencies and government; eventhough they try to destroy that rock by any nuclear bomb; because such act will cause the pollution of the earth atmosphere and scattering of the radiation to wide areas and will cause the shuttering of such rock to many pieces which will fall on a large area of the earth.
So all mankind should come to God Most Gracious Who sees all the corruption that people do and all the blasphemy that they commit and He is All-Able to tear up the earth as did He tear up another earth: the planet Phyton which left behind the Asteroids between the orbits of Mars and Jupiter.
[The mistake of Astronomers about the Asteroids 1]