(FILES) Elon Musk looks on as US President Donald Trump speaks at the US-Saudi Investment Forum at the John F. Kennedy Center for the Performing Arts in Washington, DC on November 19, 2025. Tech tycoon Elon Musk offered on March 21, 2026, to pay security personnel at US airports during a political standoff over funding for the Department of Homeland Security (DHS). The lapse in funding has led to longer-than-usual lines at airport security checks, where employees of the Transportation Security Agency (TSA) have been working without pay since mid-February. (Photo by Brendan SMIALOWSKI / AFP via Getty Images)