In a recorded speech released one day after the anniversary of the September 11 attacks, an al Qaeda leader called for more attacks within the United States.
Listeners hear Ayman al-Zawahri pushing for al Qaeda operatives to carry out continuous attacks on a smaller scale:
We should bleed America economically by provoking it to continue in its massive expenditure on its security, for the weak point of America is its economy, which has already begun to stagger due to the military and security expenditure.
Zawahri also suggested that al Qaeda members forgo purchasing any American goods and said that Muslims should stop using American currency and replace it with the currency of countries who have not attacked Muslims.
He also used the Boston Marathon Bombing to illustrate what he deems the widespread power and reach of their mission, "The Boston incident confirms to the Americans ... that they are not facing individuals, organizations or groups, but they are facing an uprising Ummah (Muslim community), that rose in jihad to defend its soul, dignity and capabilities," he said.
Security experts believe that Zawahri is currently living on the Pakistan-Afghanistan border.
On Friday, the U.S. had to deal with an attack from another known threat out of the Middle East when Taliban forces set off two car bombs at the U.S. consulate in Afghanistan.
The attack then gave way to a firefight between Taliban fighters and U.S. security forces, leaving two Afghans, a police officer, and a security guard dead. U.S. officials said that everyone inside the building was safe and that security forces were later able to secure the area.
The attacks underscore a larger potential for violence, as the U.S. prepares to remove troops from the country by next year.
A spokesman for the Taliban took responsibility for the attack.