First Lady of the United States Michelle Obama picks up a live worm from the hand of a worker at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

Employees of Iron Street Urban Farm are screened before the afternoon Michelle Obama event.

First Lady of the United States Michelle Obama shows off a live worm at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama picks up a live worm from the hand of a worker at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama, right, and Mayor Rahm Emanuel laugh while listening to workers' stories at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama, right, and Mayor Rahm Emanuel listen to workers' explanations of soil at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama arrives at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama hugs a worker at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama, right, and Mayor Rahm Emanuel laugh with works at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama looks at a fish being held in the hand of Will Allen at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. Allen is the founder of Growing Power. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama hugs a worker at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama listens to a beekeeper's explanations at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama, center, and Mayor Rahm Emanuel, left of Obama, listen to workers' explanations of soil at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

A Mayor's press aide lifts the rope for press to enter the area surrounding a greenhouse (where First Lady Michelle Obama visited)at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama, middle, Erika Allen of Iron Street Farm and Mayor Rahm Emanuel talk and laugh at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama, left, is escorted by Erika Allen and Mayor Rahm Emanuel through Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama, right, is escorted by Erika Allen, Mayor Rahm Emanuel and Will Allen, left, into a greenhouse at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

A law enforcement official uses binoculars to inspect the area during a visit by First Lady of the United States Michelle Obama to Growing Power's Iron Street Farm, 3333 S. Iron St., Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama greets a worker at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama steps over planted vegetables at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama, right, and Mayor Rahm Emanuel shake a worker's hand at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama shows off a live worm at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times

First Lady of the United States Michelle Obama, right, is escorted by Erika Allen, Mayor Rahm Emanuel and Will Allen, left, into a greenhouse at Growing Power's Iron Street Farm, 3333 S. Iron St., during a visit Tuesday, Oct. 25, 2011, in Chicago. | John J. Kim~Sun-Times