In the next following sentences,what does the underlined and sentence 2 mean?
1．today he thanked the Reagan Administration and said he was darn proud to be an American.
2．He joked he would not like to take up Jacbson's challenge to reporters earlier in the day to a six-mile jog around the airport
3．He was also seen by a members of the special stress--managementteam sent from Washington
4．Hospital officials said they still don't how many days Jacbosn will remain for tests and debriefing sessions
1 Thanked = said thank you darn = very
2 Someone had made a challenge about running 6 mile and he said he wouldn't want to accept the challenge and try to do it
3- 'a members' is a mistake
4 Debriefing- when someone is questioned after an event to get all the useful imformation possible