A Pakistani immigrant was sentenced to 30 years in prison Monday for hatching an unsuccessful plot to blow up a busy Manhattan subway station as revenge for wartime abuses of Iraqis. Shahawar Matin Siraj, 24, was arrested Aug. 27, 2004, on the eve of the Republican National Convention. Though there was no proof he ever obtained explosives or was linked to any terror organizations, prosecutors said his intentions were ominous: He wanted to blow up the Herald Square subway station, a bustling transportation hub. Siraj showed no reaction as the sentence was read. He faces deportation when his sentence is completed.