might face on mars. they are taking part in simulated activities and science work. eating like astronauts and dealing with maintenance and equipment failures, as they undergo strenuous psychological testing as well as physical testing. this mission will be fold by two more with different crews. would you do it? let s i think it s like do you remember the movie, biodome with pauly shore? kind of. everyone is going to love this reference, by the way. it reminds me of that. no, i would never do that. it sounds terrible. but i respect those who do, on the grounds of science. staying on serious and very, very important news. russian state media says yevgeny prigozhin remains under investigation for inciting a, quote, armed invasion, and what that could mean for the former boss. and a mountain is turning pink and reddish, a natural phenomenon that is named
driver s license number from decades ago? well, neither do i. but questions like that are leading to massive voter confusion and rejected ballots and applications. the result of a new republican led election law in one of the biggest states. and leading this hour, what s real and what s not on the russian-ukraine border? let s get straight to cnn s matthew chance in kyiv. president biden said there were more than 150,000 russian troops around ukraine right now. ukrainian officials believe that is not enough for a full-scale invasion? reporter: that s right. that s according to the most reason ukrainian military intelligence analysis that we ve got, given to us earlier today, exclusively here at cnn, concurring with president biden s assessments of how many russian troops there are close to the border. he said 150,000.