American aid worker killed by Islamic State militants in Syria praised for his humanitarian workAn American aid worker killed by Islamic State militants in Syria was praised for his humanitarian work Sunday during a memorial service attended by hundreds that included readings from the Bible and the Qur’an.Peter Kassig, who took the first name Abdul-Rahman after converting to Islam during captivity, was remembered as a good man, son, student and volunteer who dedicated himself to helping others and lived a short but full life.