by Stephanie CrosbyHundreds of Louisville teenagers are expected to take part in a 30-hour fast this weekend. Nearly 17-hundred teens from various churches in the Louisville area will start the fast after lunch today.About 50 teenagers from St. John United Methodist Church in Prospect are participating. Youth Pastor Nathan Calvert says it’s an important exercise for the young people.“They need to know what it’s like to step in the shoes of someone else who doesn’t have the resources we have in the United States," says Calvert. "One of our two big goals is that they experience hunger, and hopefully allow them to grow in compassion for other people who are in need.”Calvert says the other goal is to raise money for Haiti relief. Each participant has collected monetary sponsorships for their fast that will be donated to World Vision.The Christian relief organization is putting on the event nationwide, called the “30 Hour Famine". Calvert says his church hopes to raise two-to-three thousand dollars.