Donald Trump told a group of veterans on Monday that some members of the military develop mental health issues because they are not “strong” and “can’t handle it.”

“When you talk about the mental health problems, when people come back from war and combat, they see things that maybe a lot of the folks in this room have seen many times over. And you’re strong and you can handle it, but a lot of people can’t handle it,” Trump told an audience of military veterans at an event in Northern Virginia on Monday. “And they see horror stories, they see events that you couldn’t see in a movie – nobody would believe it.”

Mental health advocates have been trying for decades to destigmatize depression, post-traumatic stress disorder and other issues in hopes of empowering people to not be afraid to seek out medical help. The stigma surrounding mental health has been especially difficult to combat in the military, where many believe that they should be strong and brave enough to handle these issues on their own and that asking for help is a sign of weakness. Suicide has become an epidemic among veterans, and more than 20 end their lives each day.

Trump said these suicides often occur because veterans are not able to quickly make an appointment for “what could be a simple procedure, a simple prescription.”

During the town-hall-style event, a combat veteran asked Trump what he would do to end the “social engineering” in the military, which now allows women and transgender individuals to serve. Trump agreed that the military has become too “politically correct” and said he would follow the recommendations of top military leaders.

“We have a politically correct military, and it’s getting more and more politically correct every day,” Trump said. “And a lot of the great people in this room don’t even understand how it’s possible to do that. And that’s through intelligence, not through ignorance – believe me – because some of the things that they’re asking you to do and be politically correct about are ridiculous.”

Trump’s comments came during his first campaign event since new revelations about his personal taxes, which have drawn intense scrutiny, but he did not mention the New York Times report on Saturday that said he declared a loss of $916 million on his 1995 income tax returns, which could have enabled him to avoid paying federal income taxes for 18 years.

Instead, Trump continued to criticize Hillary Clinton’s use of a private email server as secretary of state and laid out his plan to counter the threat of cyberattacks, an issue that came up during the presidential debate last week, although he struggled to provide a clear answer.

“Hillary Clinton’s only experience in cybersecurity involved her criminal scheme to violate federal law,” said Trump, referencing Clinton’s emails. A Justice Department criminal probe of Clinton’s email practices resulted in no charges against her.

Trump said the threat of cyberattacks from the governments of countries such as China, North Korea and Russia constitutes “one of our most critical” national security concerns. As president, Trump said, he would promptly commission a review of cyber defenses and weaknesses and ensure that the issue is a high priority.

However, Trump has sent mixed messages about safeguarding against online attacks from foreign intruders. During the summer, he called on Russia to hack Clinton’s emails in hopes of recovering the ones that she said were personal and deleted.

“Russia, if you’re listening, I hope you’re able to find the 30,000 emails that are missing. I think you will probably be rewarded mightily by our press,” Trump said in July.

Monday’s town-hall-style event in Herndon, Va., was hosted by a political action group called Retired American Warriors. Trump gave prepared remarks and then fielded some questions from the friendly audience.

Trump said those who violate rules governing classified information should be prosecuted to the “fullest extent of the law.”