Joshua works on writing his name for the first time below his mom Amanda's handwriting as he practices his letters at Children's Hospital Colorado in Aurora.
Joshua holds his breath in the CT machine during the first day of chemotherapy treatment at the Children's Hospital Colorado in late April in Aurora.
Joshua cries in the arms of his father, Joseph, while he receives a shot of Neupogen from his mother Amanda that increases production of stem cells in his bone marrow during the early stages of the chemotherapy treatment at the family's home in late April in Colorado Springs.
The Salmoiraghi family prays before dinner at their home in April in Colorado Springs. Joshua led the prayers and said thanks for the motorcycle that he received from the Colorado Springs Police Department and for being home after his first round of chemotherapy.
Joshua, left, plays with his brothers Timothy, 10, center, and Benjamin, 7, on the family trampoline in the evening in late April.
Joshua completes his daily chores, one of which is unloading and putting the dishes away, at home in April in Colorado Springs.
Colorado Springs police chief Pete Carey, left, reads the rights of becoming the Colorado Springs youngest officer to Joshua as he was sworn in at the Colorado Springs Police Department on in late April in Colorado Springs. The rights included listening to his parents, eating his vegetables, hug his parents, sharing his toys and to remember to be brave and that he is loved by many.
Joshua wheels his stand with the IV drips around the 7th floor at the oncology ward as he was hoping to go to the play room which wasn't open during his third round of chemotherapy at Children's Hospital Colorado in Aurora.
Joshua cries as he is comforted by his mother Amanda as the clinical team preps to have his port de-accessed, something that causes him a great deal of fear, at Children's Hospital Colorado in Aurora.
Joshua watches 'Teen Titans' on TV as he receives his blood transfusion at Children's Colorado Urgent and Outpatient Specialty Care in Colorado Springs.
Joshua, dressed as Batman, sips on his hot chocolate at Children's Hospital Colorado in Aurora.
Joshua puts his feet on the table after taking some bites of his lunch while the clinical team work to change his IV lines at Children's Hospital Colorado in Aurora.
Joshua laughs and throws a blanket on the family dog Sammy as Sammy was believed to be a volcano and the blanket would stop the lava from Sammy from flowing all over the room at the family's home.
Joshua is helped by his mom Amanda with brushing his teeth before bed at the family's home in Colorado Springs.
Joshua tries to use the inflatable sled to slide down the stairs but ends up sliding down using his body as he yells "I broke my back bone" and laughing on his way to the bottom of the stairs.
Joshua holds his nose as his dad Joseph gently throws him into the pool at the "splash" pool at the Iron Horse Physical Fitness Center at Fort Carson in Colorado Springs.
Joshua runs to towards the downtown Colorado Springs, Colorado Police Department as he and his father Joseph brought thank you donuts for the officers as a token of appreciation during his treatments over the last several months.
Joshua poses for a portrait behind an 'American Ninja Warrior' blanket at his home in August in Colorado Springs. Later on, the host of American Ninja Warrior Akbar Gbajabiamila posted the photo his dad Joseph took and stated, "We all know this LIL’ NINJA IS A FIGHTER."
Joshua Salmoiraghi stands at attention after he was called on stage after all the new officers were pinned in September in Colorado Springs. Earlier in the year, the Colorado Springs Police Department swore in the young officer and supported him as he underwent his journey with chemotherapy.
Joshua Salmoiraghi makes his way through a tunnel of high-fives as his mom Amanda Salmoiraghi, center, shows her excitement while family, friends, and many more from the clinical team line up to celebrate him being done with his sixth and last round of chemotherapy in late August at Children's Hospital Colorado in Aurora.
Joshua signals a thumbs up as he celebrates his last time to being anesthetized for his chest radiation that started in September at the UCHealth Radiology in Aurora.
Joshua peers around the corner of the Stetson Hills Division as he and the officers working on Christmas day take part in the annual Nerf War tradition in Colorado Springs.
Joshua and his family celebrate his fifth birthday at Moon Star II on Sunday, Dec. 23, 2018 in Colorado Springs. To celebrate Joshua's birthday the family ate at their favorite Chinese restaurant and received free appetizers in his honor.
Joshua Salmoiraghi stares out the window of the hospital room after being checked into the ICU at UCHealth Memorial Central in early July in Colorado Springs. Joshua had a 101.4 degree fever that morning.