we want to show u what jeffrey gettleman of "thnew york times" h found in one corner of somalia. in the city of ada in the centl part of that country. there, peace andtability have broken out, thanks to the vision of one man who came home fm erica. >> repter: 37-year-old mohammedaden is aman on a mission. >> what i do daily solves the oblem. lack of fo and water. we need security. now we're forcedo do for the economics. >> repter: since2008, mohammed has be thee facto mayo goverr and evenwaord ofadado, austy town in a destitute country,somalia. the problems he faces are typical insomalia. his backound is not. >> i w afid. when i w comingo come in here. i was afraid because i basically heard a bad thing about th region. but when iarrived, my mind changed. >>eporter: mohaed returned in 2008 on aersonal mission -- aid victims of a drought. heeft hi country 16ears earlier after being shot in the ankle by a stray bullet when the country spiraled intonarchy after the governmen collapsed. he eventually me his way to the u.s, first livin in a miamiomeless shelter, then taking agreyhoundu

. >> that was jeffrey gettleman in somalia for "the new york times." >>> and one note from europe tonight. a court in italy has overturned an immunity la shielded prime minister silvio berlusconi from a corruption trial while he is in office. the court said the law was unconstitutional, and it paves the way for the corruption proceedings to resume. the ruling could increase pressure on the prime minister to resign and hold early elections. berlusconi said any trial would be, quote, "a farce." >>> we turn once again to one of our core issues here on "worldfocus," which is the global environment. we didn't know this and maybe you didn't either, but south korea is in the middle of a revolution, a green energy revolution that is getting international recognition for its scope. as we think about our own efforts here in the united states, it might be useful to keep in mind what steve chao of al jazeera english found as he looked at what south korea has been up to. >> reporter: for centuries, south koreans have relied on the ebb and flow of the tide to harvest their shellfish. the country's west