with no proof claimed thousands of muslims in new jersey cheered when the twin towers fell. donald trump once again ratcheting up the rhetoric in the republican race. and with iowa just around the corner, is this the language that might help him win the nomination? welcome to "the lead." i'm john berman in for jake tapper. we begin today with breaking news in our world lead. a neighborhood in paris sealed off after police discover what may be a suicide vest in a garbage can. cnn affiliate bfm reporting the vest contained the same explosives used in the november 13th attacks along with bolts that could turn into shrapnel. all this as an urgent international dragnet is still out for this man, salah abdelsalam, the suspected eighth isis terrorist blamed for the deadly wave of carnage across paris more than a week ago. french police have launched 300 raids since the attacks. they've deployed 10,000 police officers, 6,500 soldiers