MEGADETH will play two shows in Buenos Aires, Argentina next month on Wednesday, May 28 and Thursday, May 29. As previously reported, MEGADETH will also perform in Santiago, Chile on May 31. More South American shows will be announced soon.MEGADETH's February 4, 2008 concert in Helsinki, Finland marked the band's live debut with new guitarist Chris Broderick, who has previously played with JAG PANZER and NEVERMORE. The third installment of the U.S. Gigantour the acclaimed traveling heavy music festival launched in 2005 by MEGADETH mainman Dave Mustaine will launch April 12 in Denver, CO with headliner MEGADETH, Swedish metal band IN FLAMES, Finland's CHILDREN OF BODOM, Arizona's modern extreme JOB FOR A COWBOY and Oakland, CA heavy power trio HIGH ON FIRE all confirmed. The 29-date trek will criss-cross North America and wraps May 22 in Phoenix, AZ.