and finally, jim mel chefsky is retiring after 30 years at nbc. he's done an outstanding job mostly covering the department of defense. this may be my last press conference here. so i just wanted to thank jim for the extraordinary career he's had and the great job he's done and he gets the last question. >> thank you very much, mr. president. first back to isis and iraq. and syria. your very own national counterterrorism operation has found that despite all the devicisive defeats the coalitio have dealt to isis on the battlefield that they expanded their threat worldwide to include as many as 18 operational bases. in the six years you have been dealing do you feel any personal disappointment there hasn't been more progress and in any discussions you have had with the u.s. military and your intelligence agencies, have you come up with any new ideas on how to deal or defeat isis? >> every time there's a terrorist attack i feel disappointment because i would like to prevent all of them. and that's true not just when the attacks are in europe or in the