15 years on, the 9-11 attacks still makes the US feel unsafe. We interviewed some Americans about their concerns over safety and security.

According to a Gallup poll in March, 48 percent of Americans surveyed were "completely worried" about the possibility over a future attack.  23 percent said they were worried to a certain degree. Despite precautions to deal with planned attacks, there are still security vulnerabilities. The Orlando shooting in June shows that terrorists are hidden in the community and can easily get military weapons.