A space shuttle's painstaking, earthbound journey through the streets of Los Angeles to its final destination required 18 months of advanced engineering to minimize the impact on a busy urban infrastructure corridor. The 122-ft-long, 78-ft-wide, 58-ft-high Endeavour began its 12-mile trip from Los Angeles International Airport at dawn on Oct. 12 and arrived at the California Science Center by 11 a.m. on Oct. 14.