WASHINGTON—U.S. Sen. Amy Klobuchar on Thursday announced a critical amendment she helped introduce earlier this week to strengthen security at airports has passed the Senate as part of the Federal Aviation Authority Reauthorization bill. The amendment will strengthen U.S. airport security, especially in non-secure "soft" target areas at airports like check-in and baggage claim areas, a release said.

It would also increase the presence of federal agents with bomb-sniffing canines at these non-secure areas, and direct Homeland Security funding to enhance security in these "soft" target areas.