1: Biden's uncle's WWII death is questioned

2: Biden criticizes Trump's military leadership

3: Trump's fitness to lead the military in question

4: Biden's claims about his uncle's death

5: Campaign tension rises over military remarks

6: Trump's response to Biden's criticism

7: Biden's credibility on military matters doubted

8: The impact of Biden's WWII story on voters

9: Uncertainty surrounds Biden's military narrative