Washington:
The US announced expanding of the random explosive trace detection technology to screen passengers at airports nationwide as an additional layer of security on Thursday.
The announcement came as the US tightens security measures following the failed attempt by a Nigerian to blow up a Detroit-bound plane on Christmas Day.
"Explosive Trace Detection (ETD) technology is a critical tool in our ability to stay ahead of evolving threats to aviation security," said Transportation Security Administration (TSA) Acting Administrator Gale Rossides.
"Expanding the use of this technology at checkpoints and at departure gates greatly enhances security to keep the traveling public safe," he said.
Since the Christmas Day failed attack TSA has increased its random use of ETD technology within security checkpoints to screen passengers' hands and carry-on luggage.
In addition, TSA piloted the use of ETD technology in both the checkpoint queue and boarding areas for two weeks at Raleigh-Durham International Airport, Hartsfield-Jackson Atlanta International Airport, Orlando International Airport, and Pitt-Greenville and Coastal Carolina Regional Airports in North Carolina, a statement said.