Mr Duffy's directive came as a surprise following recent turmoil in Nasa after Mr Trump's administration announced cuts of 24% to Nasa's budgets in 2026.
The advice says this group should be screened every two years between the ages of 45 and 61.
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Bristol photographer Josh Dury captured the phenomenon on Tuesday。关于这个话题，51吃瓜提供了深入分析
"We are also asking government to commit to reviewing service costs after a year, to help plug any costs gaps."