Inside Kabul airport, lack of food and water, high heat, big crowds drive 1 family to leave

Sources describe chaos, desperation as officials struggle to evacuate thousands.

On the fourth day of waiting, "Ahmad" had enough. He left Kabul airport, heading back through the Taliban checkpoints and bringing his family of five home. Desperate for safety and security for his wife and three children, he felt he had no choice but to step back into the fray with his family in search of food, water and a reprieve from the brutal heat. Stories like Ahmad, whose real name ABC News is not using for his safety, speak to the deteriorating conditions at Kabul's airport, where thousands of U.S. troops and diplomats are working in overdrive to help evacuate tens of thousands of U.S. citizens, Afghan partners and other foreigners. So far, the U.S. has evacuated roughly 30,300 people since the Taliban seized control of Afghanistan a little over one week ago, according to a White House official.