Submitted by ub on Fri, 07/03/2015 - 08:49

There will be thousands patrolling the streets, while FBI agents have set up coordination centers all over the nation, and public safety officials are urging citizens out and about this weekend: If you see something, say something.

The National Terrorism Advisory System, or NTAS, replaced the color-coded Homeland Security Advisory System (HSAS) in April, 2011. The NTAS system effectively communicates information about terrorist threats by providing timely, detailed information to the public, government agencies, first respondents, airports and other transportation hubs, and the private sector.

It recognizes that Americans all share responsibility for the nation's security, and should always be aware of the heightened risk of terrorist attack in the United States and what they should do.

U.S. on high alert heading into July 4 weekend… via @cbsnews

CNN: Is the July 4th terror threat hyped?

The ISIS Americans accused of plotting terror on US soil via @MailOnline