Days before he became the first person diagnosed with Ebola on American soil, a Liberian official says Thomas Eric Duncan answered "no" when asked if he had touched anyone with Ebola despite having contact with an infected woman who died.

Liberian authorities tell CNN they "will seek to prosecute" if Duncan lied on his health screening questionnaire before leaving West Africa.

Did U.S. Ebola patient lie on airport questionnaire?

That's not the only screening process that failed. When Duncan went to Texas Health Presbyterian Hospital Dallas last Thursday with a fever and abdominal pain, and told a nurse that he had been in Liberia, he was still sent home.

That hospital was supposed to be specifically prepared for Ebola, which begs the question: Are U.S. hospitals prepared for an Ebola outbreak?

Drew Griffin has the report.

Every day passengers from Liberia are making their way to the United States. Over the past year more than 17,000 people made that flight.

But if a questionnaire and quick medical check-up wasn't enough to stop Thomas Eric Duncan from bringing Ebola to the U.S., does the U.S. need to temporarily restrict passengers from the Ebola hot zone?

OutFront, CNN Counterterrorism Analyst Phil Mudd, Mark Krikorian, The Executive Director For The Center For Immigration Studies And CNN National Security Analyst Juliette Kayyem.

New details about the man at the center of America's Ebola scare. CNN is learning that he shared a home with a woman who died from Ebola. Alexandra Field has more on who exactly is Thomas Eric Duncan.