NASA's explanation about Chelyabinsk-meteor-15-feb-2013, is like a post-mortem-report about death of our earth, We need prevention-report http://neo.jpl.nasa.gov/news/fireball_130301.html http://en.wikipedia.org/wiki/Chelyabinsk_meteor

List of attacks on mother-earth from outer-space-universe between 2000 to 2013

https://b612foundation.org/list-of-impacts-from-impact-video/

List of attacks on mother-earth from outer-space-universe between 2000 to 2013

8/25/2000 (1-9 kilotons) North Pacific Ocean

4/23/2001 (1-9 kilotons) North Pacific Ocean

3/9/2002 (1-9 kilotons) North Pacific Ocean

6/6/2002 (20+ kilotons) Mediterranean Sea

11/10/2002 (1-9 kilotons) North Pacific Ocean

9/3/2004 (20+ kilotons) Southern Ocean

10/7/2004 (10-20 kilotons) Indian Ocean

10/26/2005 (1-9 kilotons) South Pacific Ocean

11/9/2005 (1-9 kilotons) New South Wales, Australia

2/6/2006 (1-9 kilotons) South Atlantic Ocean

5/21/2006 (1-9 kilotons) South Atlantic Ocean

6/7/2007 (1-9 kilotons) Finland

8/9/2006 (1-9 kilotons) Indian Ocean

9/2/2006 (1-9 kilotons) Indian Ocean

10/2/2006 (1-9 kilotons) Arabian Sea

12/9/2006 (10-20 kilotons) Egypt

9/22/2007 (1-9 kilotons) Indian Ocean

12/26/2007 (1-9 kilotons) South Pacific Ocean

10/7/2008 (1-9 kilotons) Sudan

10/8/2009 (20+ kilotons) South Sulawesi, Indonesia

9/3/2010 (10-20 kilotons) South Pacific Ocean

12/25/2010 (1-9 kilotons) Tasman Sea

4/22/2012 (1-9 kilotons) California, USA

2/15/2013, (20+ kilotons) Chelyabinsk Oblast, Russia

4/21/2013 (1-9 kilotons) Santiago del Estero, Argentina

4/30/2013 (10-20 kilotons) North Atlantic Ocean

Check out this great visualization of every known asteroid impact on Earth between 2001 and 2013 http://goo.gl/j6o2Sd

NASA trying to make oxygen, but mother earth alone can make oxygen in entire-universe for our survival, so we must save/protect her http://goo.gl/yXsmfU