Most applicants find the Security and Background section the most anxiety-inducing part of the DS-160. The good news: most first-time applicants will answer "No" to the vast majority of these questions. The critical rule is that omitting a reportable event — even an expunged charge or a dismissed case — is treated more seriously than disclosing one.

The 5 Categories of Security Questions

The security section is organized into groups. Here's what each covers and what "Yes" vs "No" means:

1. Criminal History

Questions cover: arrests, charges, convictions, suspended sentences, parole violations, comunutations, and pardons. You must disclose events even if charges were dropped, case was dismissed, or record was expunged. Most minor incidents outside the 5-year window still need to be disclosed — the form asks about criminal history without a clear time limit in all sub-questions.

Minor traffic violations (parking tickets, speeding with no injury) generally do not need to be disclosed unless they involved arrest or court appearance. DUI, reckless driving, assault — all discloseable regardless of outcome or timing.

2. Immigration Violations

Questions cover: previous removals, deportations, overstays, unlawful presence, visa revocations, denials of admission, and entries without inspection. These are the most consequential to answer honestly — immigration violations are cross-referenced with CBP and DOJ records.

3. Medical and Public Health

Questions cover: communicable diseases of public health significance, physical or mental disorders, and drug dependency. HIV is no longer a grounds for automatic inadmissibility as of 2024, but must still be disclosed. Drug use questions ask about controlled substance violations — not casual or past use.

4. National Security and Visa Revocation

Questions cover: previous visa revocations, suspected terrorism connections, and membership in organizations involved in terrorism or violent acts. These questions are designed to screen for national security concerns — most applicants answer "No."

5. Special Categories (Researchers and Scientists)

Questions cover: work with recombinant DNA, biological agents, toxins, or select agents. If you work in biotechnology, virology, or biosafety research, these questions require accurate answers. This is not a test — if you've worked in these fields, answer accurately.

Specific Questions Applicants Ask

Do I have to disclose an arrest that was later dismissed?
Yes. The question asks if you were "ever arrested" — not if you were convicted. A dismissed case is still an arrest. The key exceptions: if you were only questioned by police (not arrested, not cited, no charges filed), you can generally answer "No." If you're uncertain, disclose — it's better to explain a clean record than to be found to have omitted one.
I received a warning from police, not an arrest. Do I disclose it?
A formal written citation or arrest record must be disclosed. A verbal warning with no paperwork, no arrest, no charges, and no court appearance is generally not a reportable event. Check what paperwork you received — if there was a citation number or court date, it likely needs to be disclosed.
I had a tourist overstay 10 years ago. Do I need to disclose it?
Yes — previous immigration violations must be disclosed. An overstay is a ground of inadmissibility, but there are applicable waivers (INA §212(d)(12) for tourist visa overstays). Disclosing it and having a waiver available is far better than having it discovered. Overstays of less than 180 days have a 3-year bar; overstays of more than 180 days have a 10-year bar. Both can be overcome with a waiver for most nonimmigrant visa categories.
I was previously denied a visa — do I disclose it?
Yes — the DS-160 asks whether you have previously applied for a US visa. You must disclose the application itself, not the reason for denial. Officers have access to your full visa history. If your previous denial was due to a specific issue (wrong info, missing docs, etc.), be prepared to address it if asked.
What if I have a medical condition — do I have to disclose it?
Only disclose conditions that fall under the specific medical grounds of inadmissibility: communicable diseases of public health significance (TB, cholera, plague, etc.), physical or mental disorders with harmful behavior, and drug addiction. Most chronic conditions (diabetes, hypertension, well-controlled HIV) do not automatically trigger inadmissibility. HIV is no longer an automatic bar. Answer accurately but don't volunteer information beyond what the questions ask.
I worked in a lab with biological agents years ago. Do I disclose it?
If you worked in a lab that handles select agents or recombinant DNA research, the answer is yes. This is a specific subcategory of the security questions — most general applicants answer "No." Researchers, scientists, and biotech professionals in BSL-3 or BSL-4 labs should answer accurately. The question is about your work — not about general exposure.

The Cardinal Rule on Security Questions

  • Never answer "No" to a question that should be "Yes." The DS-160 is electronically cross-referenced with government databases. Officers find omissions — not just from the form itself, but from the interview, from your stated purpose, and from your social media.
  • Disclosure is not automatic denial. Most disclosed events have waiver provisions or do not apply to your situation. Omission is always worse than disclosure.
  • If you are unsure, consult an immigration attorney before completing this section. A misinterpreted "Yes" or "No" can trigger a denial that could have been avoided.

Before Completing the Security Section

  • Pull your criminal records from every country you've lived in (if required by the question)
  • Review your immigration history — passport stamps, previous visa categories, any overstay periods
  • Confirm whether any previous US visa was revoked or denied
  • For lab/research workers: get documentation of your work with any biological agents or select agents
  • Consult an immigration attorney if you have any serious prior immigration or criminal history
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