Mohammed al-Khatib was just was 6 months old when his parents carried him across the border to Lebanon. Hundreds of thousands of Palestinians like them were fleeing their homes and villages, taking only what they could carry.
On May 14, 1948, Israel declared its independence. The next day, Egypt, Jordan, Iraq and Syria declared war on Israel. Many Palestinians fled, believing they would return within days or week.
Most still haven't returned, 70 years later.