<a href="https://en.wikipedia.org/wiki/1963_Indiana_State_Fairgrounds_Coliseum_gas_explosion" id="mwwQ" rel="mw:WikiLink" title="1963 Indiana State Fairgrounds Coliseum gas explosion">Indiana State Fairgrounds Coliseum gas explosion</a>: A <a href="https://en.wikipedia.org/wiki/Gas_explosion" id="mwwg" rel="mw:WikiLink" title="Gas explosion">gas explosion</a> at the <a class="mw-redirect" href="https://en.wikipedia.org/wiki/Indiana_State_Fairgrounds_Coliseum" id="mwww" rel="mw:WikiLink" title="Indiana State Fairgrounds Coliseum">Indiana State Fairgrounds Coliseum</a> in Indianapolis kills 81 people and injures another 400 during an ice show.