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Judge, where there will be a press conference. an investigate team is on the ground to find out why this mortar exploded prematurely. >> shepard: before we know what the cause or victims, already politicians are, well, bringing in politics. reporter: well, senator harry reid of nevada was on the senate floor hours after the accident. it happened in his home state of nevada. he used it as an example of how sequestration, those budget cuts, will harm military readiness. >> just not appropriate, mr. president, that our military can't train and do the maintenance necessary. these men and women are...

Tax form. so the speculation is, the underground economy could be as large as 10% of gdp or bigger, and those people don't report the money they earn but they spend it. so it shows some spend budget not incomes. >> shepard: so one dollar out of ten, is a dollar that misses a layer of taxation. reporter: that's right. >> shepard: and those people are missing benefits. reporter: they're missing benefits but it actually surpasses probably more than one laaxation because they're not paying state taxes, local taxes, or federal taxes. california says they miss about $6.5 billion a year in tax revenu...

Cause hallucinations. >> shepard: now jodi arias, she says she does not remember stabbing her ex-boyfriend 27 times. her lawyers tried to explain that the memory lapse, with the help of a psychologist, and today in court prosecutors were not buying it. wait until you hear the tough cross-examination next. a teenager who killed three students in a school shooting last year, never showed any remorse, and for his sentencing he scrawled the world "killer" on his own t-shirt. how do you think that turned out?

As a compromise between inaction and going in. so the chemical weapons story will have a strong bearing on that. >> shepard: from your reporting in this region, is it your sense that the politicians ever read a history book? they would look at the history book and see what has happened when we have armed people in that part of the world and how years or months later the arms come back around and kill americans. they've read those same books, right? >> i think it's clear they haven't taken a close look at it, because the -- if they were to arm them they clearly hasn't fount a mechanism to keep ...

The prosecutor making headway with the main defense witness. >> shepard: there's another witness coming up to help plug the holes in this story? reporter: yeah. after scrod diwas on the stand for 18 days, a lot of people believed that the defense had their work cut out for them so they have the his doctor and one more witness as well, but this one not going so well. the next one the defense has to hope will go better because those two witnesses are the ones they're trying to rebuild their case. we do expect samuels to be on the stand more today men and the next witness potentially tomorrow. >>...