Detroit has opened a mass vaccine site for boosters at its convention center.

The TCF Center has played an integral role for Detroit residents during the pandemic, first acting as a mass testing site, a field hospital and eventually a mass vaccination site.

It is currently the only location in the city to get a third booster shot.

-ABC News’ Cherise Rudy

About 20 medical troops, a group that includes doctors, nurses and respiratory therapists, are heading to an overburdened hospital in Lafayette, Louisiana, according to a statement from U.S. Army North, the military's lead organization for national COVID-19 response.

The troops are expected to arrive in the state on Wednesday, a U.S. official told ABC News.

"This is the second time Department of Defense medical assets have deployed to support Louisiana during the pandemic," said Lt. Gen. Laura J. Richardson, commander of U.S. Army North. "While COVID-19 continues to challenge the community here and elsewhere in the U.S., we remain steadfast in our support of our local, state and federal partners."

The military is sending the medical service members after receiving a request for assistance from the Federal Emergency Management Agency, which itself had received a request for help from Louisiana Gov. John Bel Edwards.

-ABC News' Matthew Seyler

Two school districts in Florida were found to have violated state law by mandating masking-wearing in schools during an emergency hearing held by the Florida State Board of Education Tuesday.

Alachua County Public Schools and Broward County Public Schools were non-compliant with Florida Department of Health Emergency Rule 64DER21-12 and are now subject to punishment and the potential withholding of state funding.

More than 600 students in Alachua County have been quarantined since the start of the school year just six days ago, Dr. Carlee Simon, superintendent of Alachua County Public Schools, said during the meeting.

Superintendent of Broward County Public Schools Vickie Cartwright said school administrators were concerned about the number of cases that are happening in Broward County as the delta variant spreads, especially since there were only five pediatric ICU beds available in Broward County as of Tuesday morning.

“We argue that we are exercising our constitutional responsibilities to protect our students and staff,” Simon said. “We believe this is, in quote, reasonable and necessary to achieve a compelling state interest."

All Board of Education members present at the emergency meeting voted that both school districts were in violation of the law, which "protects parents' right to make decisions regarding masking of their children in relation to COVID-19."

Florida Gov. Ron DeSantis has issued in an that the board has the right to withhold state funding to schools that they find are "unwilling or unable to comply with the law.”

No punishment was specified for the schools during the emergency meeting.

-ABC News’ Victoria Arancio

Texas Gov. Greg Abbott not experiencing symptoms after positive COVID-19 test, he tweeted Tuesday.

The Biden administration on Tuesday will ship the first 188,370 doses of a 500 million dose commitment of the Pfizer vaccine to Rwanda, according to a senior administration official. The 500 million dose pledge was announced at the G7 summit in June and the contract the U.S. negotiated with Pfizer identified late August as the goal for initial shipments.

The U.S. is also sending 300,000 additional U.S. surplus doses to Rwanda Tuesday, making this first total shipment 488,370. All the doses will be distributed through Covax, the World Health Organization's vaccine-sharing initiative.

-ABC News' Sarah Kolinovsky