Lets look at simplified version of the oxidation/reduction reaction that caused the destruction of the Oklahoma City Federal Building in 1995:
3NH4NO3(s) + C10H22(l) + 14O2(g) → 3N2(g) + 17 H2O(g) + 10 CO2(g) + heat
Oxidizing agents and reducing agents are dangerous for several reasons some of which include the promotion of combustion in other materials; oxidizers have excess oxygen which can provide excess oxygen in a reaction; often oxidation/reduction reactions result in the generation of excess heat and/or pressure or the generation of flammable and/or toxic gases.
The homemade bomb that destroyed this building was packed into a moving truck. The moving truck was parked near the Federal building and then detonated. This is an oxidation\reduction reaction that resulted in the generation of excess __________ and _____________.

Lets look at simplified version of the oxidation/reduction reaction that caused the destruction of the Oklahoma...