Three North Texas firefighters were among those honored at the National Fallen Firefighters Memorial Park on Sunday.
Their names were among 85 added to bronze plaques at the memorial.
Thousands attended the service in Maryland, including cabinet members and families of the firefighters killed in the last year.
Two of the firefighters honored were from Dallas.
Krodle was born and raised in Hunt County, and lived in Caddo Mills. The 41-year-old coached his two young children and was active in his church.
Pham was born in Vietnam and graduated from North Garland HIgh School and the University of Texas at Dallas.
Investigators said the thick smoke made it impossible to see, and it appears a car or a fire truck struck Simmons, who was 51 years old.