authorities to the courier who eventually led u.s. intelligence to bin laden s compound. the senate report concludes the information was not critical. a college professor in houston, texas accused of teaching the wrong class for an entire semester. students at professor nguyen s basic chemistry class at lone star college said that the work was really difficult. even straight a students were failing test after test. one of those students says that the professor finally admitted that she had been mistakenly teaching them an advanced course instead. her alleged confession came right before final exams. teen-agers are getting their caffeine fix in a dangerous new way. they re starting to smoke it. there are new web sites popping up with on-line instructions about how to roll coffee grounds and even whole beans in cigarette paper or glass tubes. you may not have heard of this, but doctors say it s not a new trend. they re just seeing a spike in