WASHINGTON (AP) -- President Barack Obama on Tuesday signed into law a measure to create a nationwide alert system to help catch anyone who hurts, kills or makes credible threats against police officers.
Police officers pay their respects at a makeshift memorial near the site where New York City police officers Rafael Ramos and Wenjian Liu were murdered in the Brooklyn borough of New York, Monday, Dec. 22, 2014. Police say Ismaaiyl Brinsley ambushed the two officers in their patrol car in broad daylight Saturday, fatally shooting them before killing himself inside a subway station. (AP Photo/Seth Wenig)
The new system would be similar to the Amber Alerts used to find abducted children.
The bill is named for New York City police officers Rafael Ramos and Wenjian Liu, who were shot in Brooklyn days before Christmas by a man who later killed himself. Families of the slain officers were on hand to see Obama sign the bill in the Oval Office.
Obama says it's important for communities to do everything possible to ensure the safety of police officers. He says the alerts could help warn officers when there is an active threat against them.