WASHINGTON, Nov 6 (Reuters) - The U.S. Federal Aviation

Administration on Thursday ordered airlines to cut domestic

flight operations by 4% at 40 high-traffic airports starting at

6 a.m. ET (1100 GMT) on Friday, citing safety concerns about air

traffic control during the government shutdown.

Reuters first reported details of the plan, citing a draft

order. The FAA said in the final order it is requiring 4% cuts

at 40 high-traffic airports through Monday before requiring them

to cut 10% starting Nov. 14. The FAA is also imposing

restrictions on space launches but not imposing any cuts on

international flights.