It's been almost a year since a terrorist attack at a US diplomatic compound in Benghazi, Libya killed four Americans, including the US ambassador.
Now, officials believe there could be an imminent threat, and have issued a global travel alert.
April Williams has the reaction from international travelers.
Americans, be on alert.
That is the warning from the u-s government as it plans a massive embassy shutdown and issues a worldwide travel alert.
Phillip Lewis is on his way to Saudi Arabia on business.
"It gives me a slight, little pause, I guess you could say. Makes you think about it."
According to u-s- officials, the extraordinary steps are in response to growing intelligence that al-Qaeda could be in the final stages of planning an unspecified attack.
Yemen seems to be the central point of concern, but the threat stretches across the Middle East, to North Africa, and beyond.
Nearly two dozen embassies and consulates will close on Sunday as a precaution.
"I think this -- closing all of these embassies in the Middle East to North Africa is in fact unprecedented. At least, I didn't see this during my career."
Not everyone traveling abroad is as concerned.
"We trust that they have everything under control."
But Lewis is taking the alert to heart--
And will be more cautious during his time overseas.
"That's going to kind of weigh on my mind. Look around. Look at people. Look at stuff that looks suspicious, you know, for sure."
President Obama is continuing with his weekend plans in Camp David, but is receiving regular updates on the situation.
The state department says the shutdowns could extend beyond Sunday