The Transportation Security Administration said in a statement that the new rules apply to passengers flying from or through countries on the US State Department’s "State Sponsors of Terrorism" list.
Brown’s announcement came shortly after he announced the UK and US would jointly fund a counter-terrorism unit in Yemen.
List of countries
- Saudi Arabia
Passengers holding passports from the above listed nations, or taking flights that originated or passed through any of them, will be required to undergo full-body pat downs and will face extra scrutiny of their carry-on bags before they can board planes to the United States.
In certain countries that have more advanced screening equipment, travellers also will be required to pass through so-called whole-body scanners that can look beneath clothing for hidden explosives or weapons, or they may be checked with a device that can find tiny traces of explosives
The changes will mean that any citizen of Pakistan or Saudi Arabia will for the first time be patted down automatically before boarding any flight to the United States. Even if that person has lived in a country like Britain for decades, he will be subject to these extra security checks.
The procedures, which go into effect Monday, follow the botched Christmas Day bombing attempt on a Detroit-bound US airliner blamed on a Nigerian man who US officials believe was trained by Al Qaida in Yemen.