Tonight's debate between Joe Biden and Donald Trump will be the earliest ever in a presidential election cycle... In what is expected to be a spirited discussion, which candidate stands to gain - or lose - the most? (at 13:26) --- Throwback Thursday: Everyone knows why Americans celebrate on the 4th of July, right? Just wait until you learn about the shocking results from a survey on what young people do and don't understand about the Independence Day holiday (at 23:42) --- Cool tech for a hot summer! (at 47:12)