With Yemen still on high terror alert reports from Washington have revealed that it is al-Qaeda's recent technological breakthrough, the creation of a liquid explosive, which sent the Pentagon and western nations into panic over the past week.
On Wednesday a US official told International Business Times, "The Yemeni branch of al-Qaeda has developed a new hard-to-detect liquid explosive that might be used in future terrorist attacks."
Senior US security officials have explained that "Clothes dipped in the liquid reportedly became explosive devices when dry and might be worn by suicide attackers." Such technology would essentially turn anyone into a terror suspect and make prevention and detection a logistical nightmare.
As several media outlets wondered on Tuesday why the Pentagon had been so keen to see its nationals leave Yemen and arrange for the return home of all its non-essential diplomatic staff, in what appeared to be a security frenzy, Wednesday brought the answer, liquid explosive.
According to reports, Ibrahim al-Asiri, al-Qaeda's infamous bomb-maker would have helped develop the new technology in Yemen. Ibrahim Hassan Tali al-Asiri is a wanted Saudi militant who US counter-terrorism officials have accused of making the bombs used in a string of high-profile operations by al-Qaeda in the Arabian Peninsula (AQAP) since mid-2009.
As officials continue to monitor the terror threat, Yemen armed and security forces are making their presence felt across the capital, hoping the deterrent will prove efficient enough to rebuke terrorists.
The US, the UK, France and Germany have confirmed that their embassies will remain close for now as the situation remains fluid.