A man was seriously injured early Sunday in a fire that broke out on the 52nd floor of the building formerly called the John Hancock Center along Chicago's Magnificent Mile. At about 3 a.m., the fire broke out the kitchen area of a studio apartment in the 100-block of East Delaware Place. Firefighters had to force their way into the condo to rescue the man and put out the fire. The man was transported to Northwestern Hospital in serious condition. No one else was hurt and the fire was contained to the one condo, fire officials said. Since the building is a high-rise, protocol required firefighters to check all floors and all stairwells.