packed with explosives near camp phoenix. the taliban claimed responsibility for it, saying the bomber was aiming at a civilian convoy. it comes just over a week after taliban gunmen launched an assault on kabul that brought the capital city to a standstill. the los angeles city council gave final approval to close most shops that sell medical marijuana. there are currently between 800 and a thousand pot clinics operating across l.a. but under the new rules, that number will be capped at 70. mayor antonio villaraigosa still has to give his approval for the ordinance to take effect. on wall street today, stocks made early gains, but those faded in the closing minutes of trading. the dow jones industrial average lost more than two points to close at 10, 194. the nasdaq fell seven points to close over 2,203. former republican senator charles mathias has died at his home in maryland of complications from parkinson's disease. mathias represented the state of maryland for 26 years in...

so, aid organizations like the international medical corps are sending teams out into the makeshift camps day after day, pushing back against this country's unfolding medical crisis, one person at a time. >> woodruff: finally tonight, grading america's ability to prevent and respond to a terrorist attack with weapons of mass destruction. margaret warner has the story. >> warner: more than eight years after the deadly anthrax attacks, the u.s. still isn't prepared to protect the public against a biological terrorist act. that was the word today from the congressionally chartered commission on the prevention of weapons of mass destruction proliferation. in an earlier 2008 report, this panel warned that it was likely that before the end of 2013, a weapon of mass destruction would be used somewhere in the world by terrorists. it recommended 17 steps to counter that.