Will the Arizona shootings change our political culture? American people wonder

A 22-year-old college dropout shot 20 people last Saturday in an attempt to assessinate a female politician in Arizona. There were six casualties.
 

The question is: "Is there anything that can be done (by politicians, the media or just ordinary citizens) to ensure something like this does not happen again?"

Read the comments about students participating in The Learning Network, an eduactional section in The New York Times and have a dare to share your own ideas.