Yesterday was the 107th anniversary of the Tunguska  airburst that leveled a 2000 square kilometer area of forest in Siberia. So June 30th is now commemorated as Asteroid Day and there were various events and many articles about asteroids and the threat of asteroid and comet impacts on earth.  For example,

• 5 Steps to Preventing Asteroid Impact -The Planetary Society
• On Asteroid Day, raising awareness that Earth could get hit again – CBS News
• The greatest threat of planetary extinction that we’re all not talking about – The Washington Post
• Search for deadly asteroids must be accelerated to protect Earth, say experts – The Guardian
• How do you vacuum an asteroid traveling 63,000 mph? – NPR

Brian May, guitarist for Queen and an astrophysicist, talks about the asteroid threat:

May did the soundtrack for this short film for Asteroid Day:

Here two Planetary Radio Live reports on a conference in Italy: