Elon Musk's mother shares his childhood photos on his 52nd birthday

The world's richest person Elon Musk turned 52 on Wednesday. His mother, Maye Musk took to Twitter to share his childhood photos on the occasion. She wrote, "Happy Birthday Elon. We have had an extraordinary 52 years of laughing. Your grandfather had the words, KEEP SMILING, on the back of his business cards. It’s obviously a family tradition."