<P> With security after the September 11 attacks on the US becoming prevalent, causing issues with starting pistols, a trend developed to use electronic starting systems that do not use pistols, but use a "dummy" prop pistol which cannot function as a firearm that is wired to the timing system . When the starter presses the button, they emit a signal to play a simulated gunshot that is broadcast to loudspeakers behind each lane, show a flash, emit simulated smoke, and start the timing clock . Many venues have switched to the new format . Beyond the security concerns, it has also been observed that even with the use of loudspeakers, some competitors still wait for the actual sound of the gun to reach them, and since the new all - electronic starting pistols have no such problems, they became the official way of starting games at the 2012 Summer Olympics . </P> <P> Some pistols made or converted to fire blanks only can be converted to fire live ammunition . Such makeshift firearms are used in crime and many are illegal to possess in certain jurisdictions . </P>

Who shoots the gun at a track meet