In a recent report, Judy Woodruff explored the history of violence in Northern Ireland

as a warning to our own country about how quickly identity-based conflicts can spiral out of control.

Tonight, she returns to Belfast with a look at efforts to bridge the deep divisions that remain there

decades after that conflict officially ended.

It's part of her ongoing series, America at a crossroads.

Opening early each morning on Belfast-Lanark Way,

this peace gate, a symbol of ongoing separation

between Catholic and Protestant neighborhoods,

allowing easy passage between the Schenkel Road, representing

Protestant loyalty to Britain, and the Falls Road, representing Catholic Republicans in their

long fight for independence.

The summer months are cool but tense in Northern Ireland when Protestants march through

Belfast on Saturdays.

In mid-July, they light huge bonfires to mark long ago British victories over the Irish,

antagonizing their Catholic Republican neighbors.

In August, Catholics take their turn, marking the feast of the assumption and the internment of prisoners

without trial during the Troubles.

There was a two-day running gun battle with the Republicans.

Running gun battle.

Right around here.

Right where we are.

Right where we are.

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