BROOKLYN - A Long Island man was the star witness today in a federal terrorism trial in Brooklyn as he detailed foiled al-Qaida-linked plans to set off bombs and kill New Yorkers. Bryant Neal Vinas, who attended Longwood High School, took the stand in the trial of a former associate, Adis Medunjanin, who is accused of plotting to blow up the city's subway system. Vinas, an admitted terrorist, calmly testified that he relayed information to al-Qaida on the best way to blow up a Long Island Rail Road train to cause the most death and destruction. He says he drew maps and advised al-Qaida leaders to leave a suitcase full of explosives on a train. Another option involved having a suicide bomber blow himself up as an LIRR train entered the tunnels below the East River. Vinas is now cooperating with federal prosectors and took the stand as a government witness. As part of Vinas' plea deal, he's facing 10 years to life behind bars.Federal trial begins for accused subway bomb plotterPatchogue man allegedly aided al-Qaida