its stretch
...that when Nebraska completed construction of its stretch of Interstate 80 in 1974, it became the first state in the U.S. to complete its mainline interstate system?
...that when <a href="./Nebraska" id="mwAe4" rel="mw:WikiLink" title="Nebraska">Nebraska</a> completed construction of <b id="mwAe8"><a href="./Interstate_80_in_Nebraska" id="mwAfA" rel="mw:WikiLink" title="Interstate 80 in Nebraska">its stretch</a></b> of <a href="./Interstate_80" id="mwAfE" rel="mw:WikiLink" title="Interstate 80">Interstate 80</a> in <a href="./1974" id="mwAfI" rel="mw:WikiLink" title="1974">1974</a>, it became the first state in the <a class="mw-redirect" href="./United_States_of_America" id="mwAfM" rel="mw:WikiLink" title="United States of America">U.S.</a> to complete its mainline <a href="./Interstate_Highway_System" id="mwAfQ" rel="mw:WikiLink" title="Interstate Highway System">interstate system</a>?