US Senator Charles Schumer said it was a "grave injustice" that Lockerbie bomber Abdelbaset Ali al-Megrahi was allowed to die at home, surrounded by his family and friends.
The New York state senator said the Lockerbie bomb attack that killed 270 people was one of the "greatest injustices that has happened in the last hundred years"
The plane crash in Lockerbie, Scotland, took a heavy toll on New York, with 35 students from Syracuse University and two from the State University of New York at Oswego among the 270 victims.
Gaddafi is dead, his regime swept away and his man, Megrahi will be buried unheralded.
David Cameron said the Lockerbie bomber "should never have been released from prison" after his family said he had died in Tripoli.