What is associated with: a 1968 drought was so bad that this geographic feature advanced 60 miles into the semiarid area called the sahel?

What is associated with: a 1966 treaty entitles this nation bordering china to russian military help if its ever invade… What is associated with: a 1967 accident aboard the uss forrestal one of these ships caused a tragic fire? What is associated with: a 1967 jimi hendrix single was titled the wind cries her? What is associated with: a 1967 law kept english as a national language of education until all states would accept this… What is associated with: a 1968 film based on this russian novel was released in a shortened 6 hour 13 minute version? What is associated with: a 1968 george romero film kill the brain and you kill the ghoul? What is associated with: a 1968 law passed by congress stipulated that this holiday be celebrated on the second monday… What is associated with: a 1968 scarefest the title character made it a family of 3 for the woodhouses?