Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
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(CNN) – Americans will see increased security this Labor Day weekend. But the TSA tells CNN that's a function of it being a busy travel weekend not because of a specific threat.
That said, they are doing more.
Officials tell CNN they are actively tracking known foreign fighters who travel in and out of Syria, but the problem is the unknown fighters.
CNN's René Marsh reports.