The Islamic State terror group is increasingly using encrypted communications to recruit troubled Americans and urge them to carry out attacks, FBI Director James Comey is expected to tell Congress on Wednesday. Comey’s testimony is the latest effort by the Obama administration to pressure Silicon Valley companies to enable law enforcement agencies to continue monitoring communications over devices that are increasingly equipped with high-level encryption.

Treating depression and anxiety in youngsters affected by war may have lasting benefits for their mental health and ability to function in society, new findings suggest. The study, of former child soldiers and other young people affected by Sierra Leone's civil war, found that those with higher levels of anxiety and depression two years after the end of the conflict had the highest levels of these “internalizing symptoms” four years later. They also had worse post-traumatic stress symptoms and exhibited more anti-social behavior.

The memory of traumatic event - such as a car crash or being the victim of a violent crime - can cement itself in your mind within a matter of hours. But a new study has found that playing the 90s Tetris game immediately after an upsetting event can lower the number of flashbacks. And researchers say the effect is so powerful, it can even work a day after the event when it is believed the memories should well-established and harder to shift.

A $26 million visitors center complex at the Flight 93 National Memorial will be dedicated and open to the public Sept. 10, a day before the 14th anniversary of the terror attacks.

The Dallas Holocaust Museum/Center for Education and Tolerance reached out to first responders on Thursday as it launched a new exhibit about 9/11. Thanks to funding from Communities Foundation of Texas and the Dallas Office of Cultural Affairs, local police and firefighters viewed “Ground Zero 360: Never Forget” at no charge. More.

A 63-year-old businessman inspired by the heroism of firefighters during 9/11 has chosen to honor them by amassing a $1million collection of 450 firetrucks. Andrew Leider started purchasing old fire trucks 13 years ago after working with firefighters during the terrorist attack. His collection is now so large it takes up space in three warehouses in New York and Pennsylvania. More.

Before the bullets and bloodshed in the movie theater, Stefan Moton was a teenager who did push-ups and boxing exercises in his bedroom, his dreams fixed on becoming a mixed martial arts fighter. Now, his goals are humbler: Strengthen the sections of his upper body that he can still move. More.

New research reveals that the effects of PTSD can go beyond the mind - and put women's hearts and brains at risk. Post-traumatic stress disorder can wreak havoc on a person's ability to deal with small disturbances, such as a loud noise or an upsetting story in the news, and it can keep them from getting good sleep. In addition to these problems, and perhaps because of them, PTSD might also increase women's risk of heart attack and stroke, according to new research. More.