Why doesn't the military have jetpacks like the Bastille Day flier?

Several companies working on personal jetpacks, hoverboards, and jet bikes. There are some good reasons troops and civilians aren't routinely flying around just yet.

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SEE IT: 'Flying soldier' armed with rifle soars over Bastille Day parade in Paris – New York Daily News

Bastille Day flying man wows crowds with jet-powered hoverboard

Moment soldiers fly through air over NY harbour using JET PACKS and land on HMS Queen Elizabeth

Military Flyboard - Why a Military Flyboard Doesn't Make Sense

Where do you want to be in a modern battlefield, in a tank or in the infantry? - Quora

Jet Suits: Transforming Emergency Response and Counterterrorism Efforts – International Defense Security & Technology

Jet-powered flyboard soars over Paris for Bastille Day parade, France

SEE IT: 'Flying soldier' armed with rifle soars over Bastille Day parade in Paris – New York Daily News

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Jet Suits: Transforming Emergency Response and Counterterrorism Efforts – International Defense Security & Technology

A flying man over the Champs Elysees at Bastille Day Celebration in Paris

SEE IT: 'Flying soldier' armed with rifle soars over Bastille Day parade in Paris – New York Daily News