I look forward to being outside Building 1 today to greet ALL my colleagues as we return to our posts TOGETHER. I know there will be additional challenges ahead as we catch up on missed work and deadlines. I’ll support you in all of these efforts as we forge ahead as ONE #FDA pic.twitter.com/0zJSmNXU9o

— Scott Gottlieb, M.D. (@SGottliebFDA) January 28, 2019

.@AjitPaiFCC welcomes back @FCC employees this morning. pic.twitter.com/r3JnocXJzj

— TinaPelkeyFCC (@TinaPelkeyFCC) January 28, 2019

While the government officially reopened over the weekend, the Smithsonian museums and National Zoo are set to reopen on Tuesday and some national parks in remote areas may need more time to remove snow or ice before visitors can enter safely.

Federal workers will also have some logistical hurdles on their first day back at work. Some agency heads tweeted that extra resources and IT support would be available to help employees who couldn't access their computer or email during the shutdown and may now be locked out due to expired passwords.

THREAD: Some information for my colleagues - For assistance with questions related to benefits, pay, IT issues, badging and other shutdown related matters; there will be welcome back tables located in the building 32 Cafeteria. 1/4

— Scott Gottlieb, M.D. (@SGottliebFDA) January 27, 2019

ABC News' Anne Flaherty and Benjamin Siegel contributed to this report.

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