VALLEY STREAM - A Valley Stream woman has lived in the U.S. since she was 6-months-old, but the 91-year-old only officially became a citizen today.

Nina Krasnof arrived in the U.S. as a baby nearly a century ago. Her daughter, Leslie Pierno, says her mother just assumed that when her parents got their citizenship, she became a citizen too.

However, Pierno says it wasn't easy to prove since there was no paperwork showing that her mother became a citizen in 1929. Krasnof's citizenship had to be documented in order to receive Medicaid benefits.

Pierno had to track down birth certificates, death certificates and anything else that would help ascertain her mother's status.

The U.S. Department of Homeland Security eventually accepted the documents and today officially recognized Krasnof as a citizen.

Krasnof, who raised four children in Valley Stream with her husband, Michael, says she knew all along that she was a citizen.