Anil Chauhan, India's chief of defence staff, says India experienced losses in the air but denies six planes downed.
Tehran denounces enriched uranium accusations as US urges Iran to accept proposed agreement.
The 12-person crew, which includes climate activist Greta Thunberg, expects to take seven days to reach Gaza.
Will the double whammy of cracking down on immigrants and defunding research weaken the US as a research hub?