Wednesday. A 200 million experiment in the south western desert. But did we actually learn anything from biosphere two . Tom tom tom hawley takes us back 25 years. Marie republicanial president ial candidate donald trump continuing his path toward the white house. This time in president obamas hometown of chicago. Reed he spoke to the poll esh National Alliance and promised to be a championor polish communities in the united states. Listen to this. As president i will honor polands sacrifices for freedom. Were committed to a strong poland. Very committed. Totally committed. And a strong Eastern Europe as a bullwork for security and liberty. Reed this meeting with the polish National Alliance was unannounced. He also spoke at a rally in iowa. Trump and democratic candidate Hillary Clinton are both mr. Trump continues to prepare for the next debate were hearing from the democratic president ial candidate. Marie new at 3 30, Political Correspondent scott thuman talks to tim kaine and a fo