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with the information they have about human rights abuses? >> lehrer: newshour political editor david chalian goes through the list of republicans preparing to run for president in 2012. >> woodruff: we get analysis of this week's news from mark shields and byron york, filling in for david brooks. >> lehrer: and margaret warner explores the looming food crisis in north korea. >> they're typically in a chronic situation where they can barely feed their own population, so a big shock like losing half their winter wheat or their barley crops is going to affect their population. >> lehrer...

>> could we make tools to make the human rights movement more powerful by helping them do more with the information they have about human rights abuses? >> lehrer: newshour political editor david chalian goes through the list of republicans preparing to run for president in 2012. >> woodruff: we get analysis of this week's news from mark shields and byron york, filling in for david brooks. >> lehrer: and margaret warner explores the looming food crisis in north korea. >> they're typically in a chronic situation where they can barely feed their own population, so a big shock like losi...

>> could we make tools to make the human rights movement more powerful by helping them do more with the information they have about human rights abuses? >> lehrer: newshour political editor david chalian goes through the list of republins preparing to run for president in 2012. >> woodruff: we get analysis of this week's news from mark shields and byron york, filling in for david brooks. >> lehrer: and margaret warner explores the looming food crisis in north korea. >> they're typically in a chronic situation where they can barely feed their own population, so a big shock like losing...

with the information they have about human rights abuses? >> lehrer: newshour political editor david chalian goes through the list of republicans preparing to run for president in 2012. >> woodruff: we get analysis of this week's news from mark shields and byron york, filling in for david brooks. >> lehrer: and margaret warner explores the looming food crisis in north korea. >> they're typically in a chronic situation where they can barely feed their own population, so a big shock like losing half their winter wheat or their barley crops is going to affect their population. >> lehrer...

>> could we make tools to make the human rights movement more powerful by helping them do more with the information they have about human rights abuses? >> lehrer: newshour political editor david chalian goes through the list of republicans preparing to run for president in 2012. >> woodruff: we get analysis of this week's news from mark shields and byron york, filling in for david brooks. >> lehrer: and margaret warner explores the looming food crisis in north korea. >> they're typically in a chronic situation where they can barely feed their own population, so a big shock like losi...