Due to heightened security measures following Self_motion the terrorist Terrorism attacks Attack , this was the first Super Bowl designated as a National Special Security Event ( NSSE ) by the Office of Homeland Security ( OHS ) .

Depictions , reports , and propaganda about the event heightened Cause_change_of_strength tensions throughout the Thirteen Colonies , notably the colored engraving produced Manufacturing by Paul Revere ( shown at top-right ) .

Tensions became Becoming dangerously heightened in the months prior to June 1967 .

The heightened precautions were due in part to fears that effects Achieve from the storm Catastrophe would be similar to that of a devastating Destroying hurricane Catastrophe that struck Bodily_harm the region two years prior .

Loyalists also put up Placing thousands of Union flags in public places , which further heightened Cause_change_of_position_on_a_scale tension Violence .

The Belgian government mobilised Using its armed Bearing_arms forces on 31 July and a state Statement of heightened Cause_change_of_position_on_a_scale alert Warning ( ) was proclaimed Statement in Germany .

About 150,000 people evacuated Emptying their homes , and there were heightened Cause_change_of_position_on_a_scale preparations after the damaging effects Influence of Typhoon Morakot the previous year .