Photos: Minneapolis building explodes; firefighters work in brutal conditions

Fire trucks
1 Fire trucks 
Iced building
2 Iced building 
Explosion debris
3 Explosion debris 
Women watch firefighters
4 Women watch firefighters 
Minneapolis firefighters
5 Minneapolis firefighters 
Firefighters at work
6 Firefighters at work 
Hodges, Fruetel and Rybak
7 Hodges, Fruetel and Rybak 
Firefighters in Cedar Riverside
8 Firefighters in Cedar Riverside 
Ice-encrusted building
9 Ice-encrusted building