we start our reporting with itn's samira ahmed. >> to protect the u.s. homeland -- >> reporter: a sign of weakness or a fresh start for american-russian relations? nato's secretary-general announced today that president ssile defense shield was the latter. >> it is possible for nato and russia to make a new beginning and to enjoy a far more productive relationship in the future. we should explore the potential for linking the u.s. nato and russian missile defense systems at an appropriate time. >> reporter: russia's president medvedev welcomed the decision last night. and prime minister putin called it a "correct and brave decision," adding that he expected further warming of relations with the u.s., enabling russia, kazakhstan and belarus to join the world trade organization. a new tone has emerged from north korea, too, overnight. just months after defying a ban to test fire long-range ballistic missiles and an underground nuclear test, president kim jong-il has told a chinese envoy they want to restart negotiations. >> please help me in welcoming home

bein with the news from thailand with samira ahmed o itn. >> an htoric milesne says the s. aids agency on the result othe twin vaccine trial. but is it a breaktough? inbangkok, scientists carried out e search and they ow it will have aig impact. >> in the international scieific and medical communities around the globe, this tal will be regnized as a testament to thailand's ability to successfully execute a complicated vaccine trial, the largest ever attempted that ended with aredible conclusion and that brought us one ep close tore aniv vaccine. >> the million-pound trial started in 2003 and involved more than 16,000 volunteers, men d women age18 to 30 at average risk becoming infeed. for three years, half were given the vaccines. the otr half, placebo injections andere monitor for anoth three years. both drugs stimulate dferent aspects of the immune stem to fight hiv but had been deemed ilures on their own. vaccine one alvac uses a disabled poxvirus with genetic materialrom hiv inserted into it. it prompts th bodies toake "t" cells kill the infection. vaccine contns an h p