We want to start with the new terror threat. Intelligence streaming in about planning for possible attacks on passenger planes. New kinds of bombing we haven't seen before. Let's get right to Pierre... See More
We want to start with the new terror threat. Intelligence streaming in about planning for possible attacks on passenger planes. New kinds of bombing we haven't seen before. Let's get right to Pierre Thomas in Washington. Good morning, Pierre. Reporter: Good morning, George. ABC news has learned that radicals operating in Syria, are trying to develop the next information of improvised explosives that could be smuggled on to commercial planes. Sources tell ABC news, the U.S. Government has obtained intelligence an aqueda affiliate in Syria, has joined forces with Al Qaeda's satellite in Yemen, to try to produce new bombs. The Yemen group, known for its innovative explosivemaking, was behind the underwear bomb plot to blow up an airliner over Detroit. And the 2010 plot to take over cargo planes over the U.S. With printer bombs. While no specific plot has been uncovered, some U.S. Analysts believe the terrorists are trying to develop new, difficult to connect bombs, to target a U.S. Or european-bound plane. Al Qaeda in Yemen's bombmaking expertise, with thousands of foreign fighters with U.S. And european passports. Monday, the FBI director expressed his concern about radicals operating in Syria, and now Iraq, flowing over porous borders. We're spending a tremendous amount of time identifying those who go. And very concerned about Syria as a breeding ground and a staging ground for terrorist groups. Reporter: Concerns about new improvised explosives first surfaced earlier this year, opting warnings to airlines about toothpaste and cosmetic bombs. Now, we know more about why those concerns continue. George? Pierre, thanks very much.
This transcript has been automatically generated and may not be 100% accurate.