Thousands salute their fallen heroes.
Houston Fire Department rescue crew members Robert Yarbrough, right, and Anthony Livesay, left, salute.
Chief Terry Garrison presents Anne Sullivan's parents with a flag.
A firefighter reacts to a family member's mention of Engine 51.
Barbara Perez, right, mother of Capt. Matt Renaud is escorted by her son, David Renaud, as they enter the service.
Mary Sullivan lovingly touches her daughter's picture.
Photo credit: AP Photo/David J. Phillip
Thousands of fire and rescue personnel from around the country and beyond the borders paid tribute to four Houston firefighters on Wednesday. These images portray the solemn activities. They were taken by David J. Phillip, AP photographer.