By Liberty McArtor, The Stream - Half a million people are expected at the Washington, D.C. March For Our Lives Saturday. Organized by survivors of the Parkland, Florida school shooting last month, the march has garnered the rapt attention of the media, celebrities and the world.. So what are the students marching for? Who is helping them? Will they likely accomplish any of their goals? And will the actions they demand actually curb mass shootings?