The officer's and members of the Wm. Penn Fire Company extend our condolences to the Philadelphia Fire Department, and Ladder Company 10. Philadelphia Firefighters were operating on a 5 alarm fire in the Kensington section of Philadelphia when a collapse occured in adjacent structure as crew's were checking for extension. The collapse killed 2 firefighters of Ladder 10, and injured 3 other firefighters. Our thoughts and prayers to all.