"Nightline" Daily Line, Oct. 10: Michelle Obama on the Campaign Trail 11:39 a.m. ET: A Boston-bound man wearing body armor, flame retardant leggings and knee pads under his trench coat arrested at Los Angeles International Airport after a Customs and Border Protection officer found a smoke grenade and several weapons in his checked luggage is facing a federal charge for transporting hazardous material on an airplane. Read the latest HERE 10:32 a.m. ET: In the finale of "Nightline" anchor Cynthia McFadden's interview with Michelle Obama, we go on the campaign trail with the first lady, who talked about her role in her husband's re-election bid. Read more HERE and watch Cynthia's report TONIGHT on "Nightline" ET: ABC News" senior White House correspondent Jake Tapper reports: Read Jake's full report HERE Credit: STR/AFP/GettyImages