[ all ] shh! ♪ why tell the trees what ain't so? ♪ [ male announcer ] dow solutions use vibration reduction technology to help reduce track noise so trains move quieter through urban areas all over the world. together, the elements of science and the human element can solve anything. [ all ] shh! [ male announcer ] solutionism. the new optimism. nbc's chief foreign correspondent richard engel is here in america, here in new york. he has just returned from syria, which is not something that very many people in the world can say right now. we are lucky to have richard here because he's almost never here. for the last decade he has