NBC News met Zubair Nazeri in Serbia and tracked him for a year as he repeatedly tried to reach the West.
"We must start caring about children's safety more than we care about adults' reputations," gymnast Sarah Klein said.
Islamic militants disguised as Nigerian soldiers entered an army base and opened fire.
Although the law is largely symbolic, critics say the legislation is racist in origin and verges on apartheid.
Asked by NBC News' Lester Holt at the Aspen Security Forum if he ever thought about quitting his job, FBI chief Chris Wray said, "I'm a low-key, understated guy, but that should not be mistaken for what my spine is made out of."