Subsequent reports from CNN and The Daily Beast indicate that intelligence collected during a U.S. Special Forces raid in Yemen in January led to the restrictions. That is possible. The raid was highly controversial, but the Trump administration argues the costs were worth it because the U.S. learned key details about al Qaeda in the Arabian Peninsula’s (AQAP) plotting. A Navy SEAL perished during the operation, as did a number of women and children. Within hours, jihadists began circulating a photo of an adorable little girl who died in the crossfire. The girl was the daughter of Anwar al Awlaki, a Yemeni-American al Qaeda ideologue killed in a September 2011 drone strike. Al Qaeda immediately called for revenge in her name.

Whether new intelligence led to the decision or not, we already know for certain that al Qaeda has continued to think up ways to terrorize the skies. For years, Al Qaeda operatives in Somalia, Syria, Yemen and elsewhere have been experimenting with sophisticated explosives that can be smuggled onto planes.

DHS points to the “attempted airliner downing in Somalia” in February 2016 as one reason for ongoing concerns. That bombing was carried out by al Shabaab, al Qaeda’s official branch in Somalia. Al Shabaab attempted to justify the failed attack by claiming “Western intelligence officials” were on board the flight, but that excuse may be a cover for something more sinister.

Some U.S. officials suspect that al Qaeda’s elite bomb makers wanted to test one of their newest inventions, a lightweight explosive disguised as a laptop that is difficult to detect with normal security procedures. At the very least, Shabaab’s attack demonstrated that al Qaeda has gotten closer to deploying a laptop-sized explosive that can blow a hole in jetliners. While no one other than the terrorist who detonated the bomb was killed, the plane was left with a gaping hole in its side.