The city of Chicago purchased another 8,500 face shields intended to protect police officers during the NATO summit in May.
The city initially purchased about 3,000 shields for $193,000 in February when the city was planning to host both the G8 and the NATO summits simultaneously.
At the time, the Fraternal Order of Police expressed concerns that the number of shields would not be adequate if more officers were needed to respond to protests.
Since then, the G8 summit moved from Chicago to Camp David.
Nonetheless, the city spent another $757,657 in federal grant money to buy the additional shields, according to the Chicago Tribune.
The new shields fit over motorcycle helmets, are large enough to fit over a gas mask and are designed to protect against rocks and liquids.
The NATO summit takes place at McCormick Place May 20 and 21.