After surviving the war, in the 1960s Librescu studied aeronautical engineering and obtained a Ph.D. at the Institute of Fluid Mechanics, Academy of Science of Romania.
After living and teaching for several years as a dissident under the hardships of Nicolae Ceausescu's totalitarian rule--Librescu was forced to smuggle papers out of the country in order to get them published--, in 1978 Librescu and his family immigrated to Israel. There he taught at the Tel-Aviv University for 7 years.
Eventually Librescu made his way to the United States to take a teaching position at Virginia Tech, where he remained for the rest of his career and "became one of Virginia Techís most respected educators and researchers in the field of aeronautical engineering."
Over the course of these years at Virginia Tech he received an enormous amount of awards and honors, and he published extensively.
On April 16, 2007, 23-year-old student Cho Seung-hui went on a shooting rampage at Virginia Tech. By the end of the day there were 33 dead and many more wounded in what was considered the "deadliest shooting rampage in American history."
While the shooter was trying to make his way into his Norris Hall classroom, Librescu physically barricaded the door so that many of his students could escape through the windows into the bushes.
"He did not hesitate to use his body to block the door," said Zeev Bielski, a former mayor of this upper-middle-class suburb of Tel Aviv who now heads the Jewish Agency for Israel. "In that way, he gave life to many." Another said of him, "he is the reason that the student could not get inside and shoot more people," said Asal Arad, a Virginia Tech student. "Obviously, he is a hero."
He was ultimately overtaken and killed by the gunman. He was buried in Israel, and is now celebrated in as a hero and example of an "ideal ambassador" for Israelis.