mr. obama is the 19th president to have served in clark's lifetime. tonight, his family took him out for a birthday dinner and, right now, on the phone, mr. charles clark is with us. forgive me, mr. clark, are you there? >> caller: yeah. >> first of all, congratulations, sir. it is a privilege and an honor to talk to you. would e what everybody wants to know, what is the secret, sir, to living for 105 years? >> caller: moderation on everything. >> all right. everything you do. mr. clark, do you have any regrets? . no, i don't regret anything. >> i would say that you have had a wonderful life, sir, to have lived 105 years on this earth. we salute you. we congratulate you. and, mr. clark, we congratulate you for spending a couple minutes. we salute you and happy birthday. >> caller: thank you. >> how sweet. 105. that's a lot of history. >> and lives by himself as a caretaker comes in maybe twice a week. but he is still his own man doing his own thing. you've got to honor that. that's absolutely marvelous. >> he's a lucky man. >> we should be so lucky. >> yes, we should. meanwhile, down in the tropics, how lucky are they right now? >> now know what,