Trump speaks at NASA's aerospace expo in Florida

UP NEXTStephen Miller named as new White House chief of staff02:45Father of co-pilot killed in Learjet crash: ’She showed me what it is to be a hero’ 04:15Judge blocks construction on Trump’s D.C.-area arch after approval00:34Meghan Markle's estranged father is arrested in Florida04:20J.P. Morgan global market strategist on tech stock selloff 02:48U.S. adds 165,000 jobs in October, unemployment rate drops to 4.1%03:47Nithya Raman wins Los Angeles mayoral race, NBC News projects05:03Both parties gear up for legal battle as Mississippi vote count continues05:07Hero security guard confronts gunman01:30Urgent rescues during flash flood emergency01:53California Governor commutes all death sentences01:26Stocks tumble after post-election rally03:14Insurance denied her cancer treatment. One email changed everything.03:16Third-generation carnival owner fights to survive rising costs02:42California Gov. Newsom commutes all death sentences in the state02:28Former West Point cadet sued in connection with forced abortion03:26At least three people injured in shooting at Des Moines post office building02:146-year-old boy found after days in deep woods01:19Deadly helicopter crash in Florida01:46Stock market surges on election results00:59UP NEXTStephen Miller named as new White House chief of staff02:45Father of co-pilot killed in Learjet crash: ’She showed me what it is to be a hero’ 04:15Judge blocks construction on Trump’s D.C.-area arch after approval00:34Meghan Markle's estranged father is arrested in Florida04:20J.P. Morgan global market strategist on tech stock selloff 02:48U.S. adds 165,000 jobs in October, unemployment rate drops to 4.1%03:47