Concealed Carry Handgun Training and Certification at The Nation's Gun Show at the Dulles Expo Center on December 28, 2012 in Dulles, Virginia (Footage by Getty Images)

Protester Holds Up Signs to End Lax Gun Laws at The Nation's Gun Show at the Dulles Expo Center on December 28, 2012 in Dulles, Virginia (Footage by Getty Images)

Protesters Rally Against Private Gun Sales at The Nation's Gun Show at the Dulles Expo Center on December 28, 2012 in Dulles, Virginia (Footage by Getty Images)

Protesters Chant to End the Gun Show Loophole at The Nation's Gun Show at the Dulles Expo Center on December 28, 2012 in Dulles, Virginia (Footage by Getty Images)

Federal Firearms Licence Application - US form

West Virginia Gun Licence Application - US form

West Virginia Gun Licence Application - US form

Private Sales of Assault Weapons at The Nation's Gun Show at the Dulles Expo Center on December 28, 2012 in Dulles, Virginia (Footage by Getty Images)

Crowd Lines Up to Enter the Building at The Nation's Gun Show at the Dulles Expo Center on December 28, 2012 in Dulles, Virginia (Footage by Getty Images)

Father Teaches Daughter to Fire a 22 Caliber Rifle at Maryland Small Arms Range on January 20, 2013 in Upper Marlboro, Maryland (Footage by Getty Images)

South Carolina Concealed Firearms Licence Application - US form

Man filling South Carolina concealed carry permit application form close-up. US form

African American Man fires Semi-Automatic Handgun at Maryland Small Arms Range on January 20, 2013 in Upper Marlboro, Maryland (Footage by Getty Images)

African American Man Fires Handgun at Target at Maryland Small Arms Range on January 20, 2013 in Upper Marlboro, Maryland (Footage by Getty Images)

Father Teaches Son to Shoot a Handgun at Maryland Small Arms Range on January 20, 2013 in Upper Marlboro, Maryland (Footage by Getty Images)

African American Woman Fires a Handgun at a Target at Maryland Small Arms Range on January 20, 2013 in Upper Marlboro, Maryland (Footage by Getty Images)

African American Man Fires Handgun and Loads Clip at Maryland Small Arms Range on January 20, 2013 in Upper Marlboro, Maryland (Footage by Getty Images)

Man Loads Revolver and Fires at a Target at Maryland Small Arms Range on January 20, 2013 in Upper Marlboro, Maryland (Footage by Getty Images)

Interiors of a Gun Range at Maryland Small Arms Range on January 20, 2013 in Upper Marlboro, Maryland (Footage by Getty Images)

Target Practice at a Gun Range on April 28, 2013 in Chantilly, VA (Footage by Getty Images)

Weapons being Sold at Showmasters Gun Shows on March 23, 2013 in Richmond, Virginia (Footage by Getty Images)

Weapons being Sold at Showmasters Gun Shows on March 23, 2013 in Richmond, Virginia (Footage by Getty Images)

Weapons being Sold at Showmasters Gun Shows on March 23, 2013 in Richmond, Virginia (Footage by Getty Images)

Used Weapons for Sale at Showmasters Gun Shows on March 23, 2013 in Richmond, Virginia (Footage by Getty Images)