Leanne Gregg, NBC News

AURORA, Co. (NBC News) - Saturday marks the anniversary of the Aurora theater massacre, when a man opened fire in a crowded Colorado theater leaving 12 people dead and 70 injured.

Multiple events are being held this weekend to pay tribute to the victims; and as the healing continues, so do the debates over gun control.

Since the shootings a year ago, Colorado's governor has signed some of the toughest gun control laws in the nation, expanding background checks and limiting the size of ammunition magazines.

For some, like Marcus Weaver, shot twice that night, the life changing tragedy has spawned new purpose.

"I'm more directed and I'm more about community than ever before," Weaver says.

But haunting memories and scars remain.

"Here I am almost a year later, with some other people who are still depressed. It gets really tiring after awhile. I don't know if I'll get better," says 14-year-old survivor Kaylan Bailey.

Twenty-six-year-old James Holmes is awaiting trial in connection with the shootings.

The former graduate student has pleaded not guilty by reason of insanity.