One week after the last U.S. military aircraft left Afghanistan, plans are in motion to charter a plane to help Afghan allies who were left behind."It's been heartbreaking, frustrating and at times, you know, (I've been) angry about what is happening," said Jennifer Vitela, a former U.S. diplomat who served two tours in Kabul, from 2009 to 2011. Over the last several weeks as American troops withdrew from the country, she has received messages from Afghan colleagues there worried for their safety."We were trying to help some of our former employees from the embassy make it to the airport and one family, they went, and at the airport, they tried to get to the gate. They have three children and two of their children were seriously injured and they went home. Then they were going to travel up north to hopefully catch a flight and I told them to leave right away, and they waited till the morning. Before they left his cousin left to go up north, and the Taliban found him and murdered him on the spot. So they're in hiding now."While some of her colleagues tried to make their way through the airport, Vitela says others waited at home for a phone call."They were told. It's too dangerous to come to the airport, don't come to the airport, we'll call you when it's your time, and they were waiting," said Vitela. "There wasn't enough opportunity for the people who should have been on those flights to get on those flights."Among those left behind, the family of her former assistant."I have had nights where I've had a hard time sleeping because they are targeted specifically because I talked him into taking a job to work for the US Embassy. We are the reason these people are at risk. We are the reason they're being targeted."Vitela is working with her network to organize their own evacuation effort with chartered aircraft for citizens, allies, and their families who qualify for a Special Immigrant Visa (SIV). Their goal is to raise $600,000 for a plane that could transport as many as 400 people. Vitela admits much is unknown at this point as the security situation changes day by day but she says those who are able to leave would be taken to another country to go through the refugee process before traveling to the United States."We're going to do everything we can to get them to safety because we made a promise, I made a promise. And I'm not going to go back on that promise, no matter what it takes."Donations are being collected by the United Way of Greater Kansas City online with the designation "Task Force FTT."Watch the video above for more on this story.