U.S. Vice President Mike Pence would not be deterred.

His press secretary, Katie Miller, had tested positive for the new coronavirus early Friday. Air Force Two sat on the tarmac of Joint Base Andrews outside Washington later in the morning, engines running, as six aides who’d been in contact with Miller left to be tested for infection and sent home to quarantine.

Reporters and some staff still aboard weren’t immediately told the reason for the delay. After an hour, the plane took off for a scheduled trip to Iowa, where Pence would nudge churches to carefully resume in-person services and hear concerns from farmers worried they’ll lose everything to the economic collapse from the outbreak.