Every now and then then landing gear won't operate when you need it most, like the South Pacific in 1945
But that day wasn't a bad one, USMC pilot Ken Pruitt ran it out of fuel, and then coasted onto an atoll airstrip nice a slow and safe. Each of the 5 crewmembers decided to ride it out rather than parachute down... and they all walked away. Read about it at http://www.lyonairmuseum.org/news/b-25-belly-landing-on-pacific-island/