Elon Musk wants to put people on Mars by 2030. Don't count on it.

• Elon Musk set out SpaceX's timeline for getting humanity to Mars this week.
• He said SpaceX plans to send five Starship rockets to Mars in 2026, with crewed missions following two to four years later.
• Experts say SpaceX will face major engineering and regulatory challenges.

Elon Musk has set out his latest timeline for getting humans to Mars, and experts say it's a classic SpaceX move.