The US Transportation Security Administration (TSA) has signed up 15 million members to its TSA PreCheck application programme for air travellers.
More than 19,200 people applied for membership on February 21, the TSA announced, the most in a day since the system was set up in 2013.
The TSA said over 32 million people are permitted to use TSA PreCheck expedited screening after signing up via any of a range of US government programmes.
“TSA PreCheck is one of the most innovative, efficient and effective risk-based security solutions in the agency’s 21-year history,” said TSA administrator David Pekoske.
The system is for "low-risk" travellers entering TSA’s security screening checkpoints at US airports and allows them pass through checkpoints wearing their shoes, belts, and light jackets as well as keep their electronics and 3-1-1 compliant liquids in their carry-on bags.