Firefighter/Paramedic Mark Bachleda demonstrates the breathing apparatus that firefighters wear in smokey situations for second graders from Pennoyer Elementary School who were on a field trip to the Norwood Park Fire Department in Harwood Heights on Wednesday, Sept. 14, 2011. | Ryan Pagelow~Sun-Times Media

Norwood Park Firefighter Stan Koy shows second graders from Pennoyer Elementary School a hydraulic rescue tool which is used to save people who are trapped in their vehicles. It's also known as the Jaws of Life. The students were on a field trip to the Norwood Park Fire Department in Harwood Heights on Wednesday, Sept. 14, 2011. | Ryan Pagelow~Sun-Times Media

Norwood Park Firefighter/Paramedic Mark Bachleda shows Pennoyer Elementary School second grader Emily Worasutr how a thermal imaging camera works which picks up body heat and can be used when rescuers are looking for trapped people at the Norwood Park Fire Department in Harwood Heights on Wednesday, Sept. 14, 2011. | Ryan Pagelow~Sun-Times Media

Pennoyer Elementary School second graders (from left) Michael Gordon, Ethan Balduf and Michael Cozzone run out of the rain to enter the Norwood Park Fire Department in Harwood Heights during a field trip on Wednesday, Sept. 14, 2011. | Ryan Pagelow~Sun-Times Media

Firefighter/Paramedic Mark Bachleda (left) briefly shows the fire department's dalmatian Ember to second graders from Pennoyer Elementary School who were on a field trip to the Norwood Park Fire Department in Harwood Heights on Wednesday, Sept. 14, 2011. | Ryan Pagelow~Sun-Times Media

Firefighter Stan Koy shows the fire engines, ambulances and fire trucks to second graders from Pennoyer Elementary School who were on a field trip to the Norwood Park Fire Department in Harwood Heights on Wednesday, Sept. 14, 2011. | Ryan Pagelow~Sun-Times Media

Norwood Park Firefighter/Paramedic Mark Bachleda shows Pennoyer Elementary School second grader Adrian Dlogopolski how a thermal imaging camera works which picks up body heat and can be used when rescuers are looking for trapped people at the Norwood Park Fire Department in Harwood Heights on Wednesday, Sept. 14, 2011. | Ryan Pagelow~Sun-Times Media

Pennoyer Elementary School second graders Victoria Bielat and Nicolette Fiorentino listen to firefighters talk about their jobs on a field trip to the Norwood Park Fire Department in Harwood Heights on Wednesday, Sept. 14, 2011. | Ryan Pagelow~Sun-Times Media

Pennoyer Elementary School second graders Sofia Allali and Nikoletta Manos listen to firefighters talk about their jobs on a field trip to the Norwood Park Fire Department in Harwood Heights on Wednesday, Sept. 14, 2011. | Ryan Pagelow~Sun-Times Media

Firefighter/Paramedic Mark Bachleda (left) demonstrates what firefighters wear to fires while Firefighter Stan Koy talks to second graders from Pennoyer Elementary School who were on a field trip to the Norwood Park Fire Department in Harwood Heights on Wednesday, Sept. 14, 2011. | Ryan Pagelow~Sun-Times Media

Pennoyer Elementary School second grader Matthew Gordon asks a question during a field trip to the Norwood Park Fire Department in Harwood Heights on Wednesday, Sept. 14, 2011. Many of the questions revolved around the fire department's dalmatian. | Ryan Pagelow~Sun-Times Media