LOS ANGELES (AP) — At its prime, the space shuttle Endeavour circled the globe at 17,500 mph, faster than a speeding bullet.

In retirement, it's crawling along the streets of Los Angeles at a sluggish 2 mph, a pace that rush-hour commuters can sympathize with.

Endeavour's two-day, 12-mile road trip to the California Science Center where it will be put on display kicked off early Friday. Rolled on a 160-wheeled carrier, it left from a hangar at the Los Angeles International Airport, passing diamond-shaped "Shuttle Xing" signs, and reached city streets about two hours later.