pressures within cuba for change. i don't expect the change from the top. but i believe a policy of engagement can help bring about change from the bottom. >> well, it's a remarkable historic day for the united states. i know it's been a long day for you specifically congressman van hollen. thanks for joining us. >> thanks, ari, thanks for having me. >> now we go right to havana where mark potter joins us. what is the reception there? >> hi, ari, a lot of people are just learning about it now. this is the hour of the national news broadcast here in havana. some people saw raul castro at noon. word has spread throughout the island. people are processing this. there's not a big groundswell. people taking to the streets, pounding pots and pans. but i think it's safe to say that people are very engaged by this. they think this is good news. for years and years we heard people here in cuba say they