Peter Kassig, the U.S. aid worker beheaded by Islamic State, was remembered Sunday for his courageous devotion to helping the Syrian people.<br/> <br />His parents, Ed and Paula Kassig, who in an October video pleaded for their son's freedom, released a statement, saying, quote, "We are incredibly proud of our son for living his life according to his humanitarian calling."<br/> <br />U.S. President Barack Obama confirmed the Indiana native's death.<br/> <br />He praised Kassig as a humanitarian killed in "an act of pure evil."<br/> <br />Kassig was kidnapped in October 2013 while traveling for an aid project to the eastern Syrian city of Deir al-Zor.<br/> <br />With his death, Kassig became the fifth Western hostage killed by Islamic State.
