<prompt> Yimuphi umbuzo othi: Isigaba Sesihlanu soMthethosisekelo wase-United States sichaza inqubo lapho uMthethosisekelo ungashintshwa khona.? Isihloko isihloko sesihlanu soMthethosisekelo wase-United States.  <response>: Yini i-Article 5 ekhuluma ngayo? 