A timeline of Los Angeles’ path to becoming an Olympic host city for the third time in 2028:
Dec. 16, 2014: The USOC announces it will bid for the 2024 Olympics. It names four finalists to be its bid city — Boston, Los Angeles, San Francisco and Washington, D.C.
Jan. 8, 2015: The USOC announces it has chosen Boston to be its 2024 Olympic bid city.
July 27, 2015: Boston drops its 2024 Olympic bid after mayor Marty Walsh refuses to sign a document that could put taxpayers at risk if there are cost overruns.