Read this passage from the war powers resolution of 1973: "(c) the constitutional powers of the president as commander-in-chief to introduce united states armed forces into hostilities, or into situations where imminent involvement in hostilities is clearly indicated by the circumstances, are exercised only pursuant to (1) a declaration of war, (2) specific statutory authorization, or (3) a national emergency created by attack upon the united states, its territories or possessions, or its armed forces." what is the intent of this section of the document?