Katie Couric's Notebook: Juarez

But the teens were shot and killed Saturday, along with another young man, at a car dealership across the border in Juarez. News reports said at least 60 bullet casings were found at the scene.

That's hardly unusual for Juarez, Mexico's most dangerous city, where more than 3,000 people were killed last year. According to the El Paso Times, Juarez had three triple homicides last weekend alone.

Meanwhile, the White House, under pressure from the gun lobby, recently delayed an emergency rule proposed by the Bureau of Alcohol, Tobacco, Firearms, and Explosives to help track gun sales along the border.

After the president's State of the Union address, White House aides said he'd discuss gun violence at a later date. Let's hope that happens soon.

That's a page from my notebook.

I'm Katie Couric, CBS News.