This is the original source of the story. Now there is a part two, and a poll.
Pt. One:
http://www.womenswallstreet.com/WWS/article_landing.aspx?articleid=711&Titleid=1&titlename=&start=2660Snip
As we sat waiting for the plane to finish boarding, we noticed another large group of Middle Eastern men boarding. The first man wore a dark suit and sunglasses. He sat in first class in seat 1A, the seat second-closest to the cockpit door. The other seven men walked into the coach cabin. As "aware" Americans, my husband and I exchanged glances, and then continued to get comfortable. I noticed some of the other passengers paying attention to the situation as well. As boarding continued, we watched as, one by one, most of the Middle Eastern men made eye contact with each other. They continued to look at each other and nod, as if they were all in agreement about something. I could tell that my husband was beginning to feel "anxious."
The take-off was uneventful. But once we were in the air and the seatbelt sign was turned off, the unusual activity began. The man in the yellow T-shirt got out of his seat and went to the lavatory at the front of coach -- taking his full McDonald's bag with him. When he came out of the lavatory he still had the McDonald's bag, but it was now almost empty. He walked down the aisle to the back of the plane, still holding the bag. When he passed two of the men sitting mid-cabin, he gave a thumbs-up sign. When he returned to his seat, he no longer had the McDonald's bag.
Then another man from the group stood up and took something from his carry-on in the overhead bin. It was about a foot long and was rolled in cloth. He headed toward the back of the cabin with the object. Five minutes later, several more of the Middle Eastern men began using the forward lavatory consecutively. In the back, several of the men stood up and used the back lavatory consecutively as well.
For the next hour, the men congregated in groups of two and three at the back of the plane for varying periods of time. Meanwhile, in the first class cabin, just a foot or so from the cockpit door, the man with the dark suit - still wearing sunglasses - was also standing. Not one of the flight crew members suggested that any of these men take their seats.