LANSING, Mich (WLMI) Three men badly burned in a Lansing house explosion and fire are still fighting for their lives.  The Tueday morning blast on Clark Street completely destroyed the home and damaged the one next to it.  All three men were put into a medically-induced coma due to the severity of their injuries.  Officials are still investigating the cause of the explosion—chemicals found at the house are being tested to see if they caused the blast.