who killed nisman? we play never know. >> and that's something that upsets many people here that it will be another crime in argentina that will remain unresolved. teresa vo, al jazeera, buenos aires. >> a bombing in northern ireland has rekindled fears of more attacks, as the country comenl ratecommemorates the 100th anniversary of the revolt. later ireland will remember the 1916 easter rising when key buildings were seized in dublin, igniting a war with britain that won independence for ireland in 1921. >>> a week after cessation of hostilities in syria, in the past week all sides of the conflict have reportedly broken the truce. as al jazeera's omar al saleh reports that's putting next week's u.n. backed peace talks in jeopardy. >> a moment of peace. for many people in syria these scenes are unusual. live scenes in this mark place in aleppo in northern syria. >> people are out and buying. women are even stopping to bargain about the price. before the truce they didn't. they used to be scared. >> repo

there was a covering up in 1994 so we don't know the truth of who killed nisman.we may never know >> reporter: smaes something that upset many people here, that it will be another crime in argentina that will remain unsolved >>> music is a lifeline for many in the democratic republic of congo. a group of self-taught musicians are taking the stage. >> reporter: it's early evening in one of the poorer neighborhoods of the capital, where this symphony orchestra is rehearsing. most of its musicians have no steady income. during the day they do what they must for their daily hustle. we find them rehearsing the old composition, a story of the transcribe legislations and how they're over coming them. this orchestra was created back in 1992. he only had three instruments in his father's church. >> translation: things have changed. years ago it was different. we're seeing more people, but there's still much to do. [ ♪ ] >> reporter: in down town local music dominates the nights. people come out to listen and dance, to songs by some of the continent's greatest artists. this

who killed nisman?never know. >> reporter: and that's something that upsets many people here. that it will be another crime in argentina that will remain unresolved. teresa bow, al jazeera,. >>> a human rights group is ledging a link between oil production and dangerous levels in heavy metals in drinking water in south sudan. the problem is isolated to the north of the country around the processing plant. the sign of hope organization says 180,000 people are facing life-threatening health risks. we have this report from south sudan. >> reporter: the people of the village in south sudan take groundwater straight from the source. they use it for drinking, washing, and cooking. but within sight of this small community is the oil facility. it hasn't functioned for more than two years, since the oil company evacuated at the start of the conflict. now broken pipes lie rusting in pools of filthy water. and spilled oil covers the ground. but the hospital in the nearby town staff see health issues which they bel

prosecutor alberto nisman died over a year ago. he was found with a bullet wound in the head.authorities believe that it could have been murder. >> translator: if he killed himself he would have had gun powder on his hand. he didn't. we did several tests with the gun that was used and there was gun powder. nisman had none of his hand. >> reporter: accusations said that the president received bribes in exchange for the cover of a bombing of a jewish center. members of the judiciary seem to be more willing to pursue an investigation. in the last year conspiracy theories have flourished in this country. some are convinced he was murdered because he was a threat for the argentine and iranian governments. this is a former spy master with close links with the cia and israeli intelligence. the only image of him is this picture. he has recently said in court that those behind the killings were close to president curber in and suggested that iran may have been behind his death. but this man says he should be investigated as well. >> translator: this man was fired by the administration,

we did self with the gun used, and there was gunpowder, and nisman had none on his hands. he was found dead the day before he was going to trial for a secret deal with iran. concessions for covering iran's role in the terrorist bombing of a jewish community center in cyrus in 1994. the case against kirchner was thrown out. the investigation into what happened to the prosecutor, in the last year, conspiracy theories have flourished in this country, and many believe that nisman killed himself, and others are convinced that he was murdered because he was a threat for the argentine and iranian governments. a former spy master with close links with the cia and israeli intelligence. the old image of him is this picture. he has recently said in court that those behind the killings were close to former president, kirschner, and he even suggested that iran could have been behind his death. he played an active role in the investigation, and he said that he should be investigating as well. >> this man was fired by the kirchner administration, and he was angry and his way of seeking r