....students were enraged when their principal received a letter from militants saying they would shut down the school.
"It is our right to get education," one of the girls in the school said.
A parent said his daughter "is constantly told by her teachers to attend school in a head-to-toe veil ever since the principal of the school received a letter of threat".
Several girls' schools in Swat have received letters with warnings that they will be blown up if the students do not attend classes in burqas.
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