praised the deal. british police now say the mail bomb they discovered on a flight from yemen was timed to blow up over the east coast of the u.s. the explosives were discovered hidden inside printers on cargo jets. investigators say a timer was set to explode over very populated areas as terrorists tracked the plane's flight online. the space shuttle "discovery" is facing an extended delay before it blasts off one final time. nasa discovered two cracks on "discovery's" fuel tank yesterday. those are in addition to a larger crack also on the huge tank. engineers believe the cracks can be fixed on the launch pad, but "discovery's" november 30th launch date is now in jeopardy. the federal government wants to scare 46 million american smokers into quitting. the plan calls for graphic warnings on every cigarette package. here's linsey davis. >> reporter: toe tags, cancer patients, cigarette packs are about to get a makeover. changing from this, to this. >> this is a watershed event. the american people turning back