JPL: Defenders against Near Earth Objects

I’m writing up our first reader request!  Among several questions I received was who is watching out for asteroids/meteors/meteorites?  As you all are aware from the Russian meteorite in March of 2013, these things still come flying at us and pose a legitimate threat (just ask the dinosaurs).

So what kind of programs do we have to watch out for these objects seeking to slam into our home?