jet fly supersonic speed residents startle loud boom north american aerospace defense command norad say statement two fighters able establish communication aircraft incident occur p.m. et detail immediately available intent military intercept identify aircraft re-establish communications local faa air traffic controllers instruct pilot follow air traffic controllers instructions land safely follow-on action statement read.earlier month private plane get within nautical miles air force one close permit fly florida incident investigate authorities bloomberg report fox news two f-15 fighter jet call intercept unresponsive plane violate airspace near mar-a-lago