Leading the National Effort. The Department of Homeland Security provides strategic guidance to public and private partners, promotes a national unity of effort, and coordinates the overall Federal effort to promote the security and resilience of the nation's critical infrastructure. November is Critical Infrastructure Security and Resilience Month.
A hamstring injury is a strain or tear to the tendons or large muscles at the back of the thigh. It's a common injury in athletes and can occur in different severities. The three grades of hamstring injury are: 1  grade 1 â a mild muscle pull or strain.ecovering from a hamstring injury may take days, weeks or months, depending on how severe the strain or tear is. A completely torn hamstring (grade 3) may take several months to heal and you'll be unable to resume training or play sport during this time.
And we call that a grade-two or partial tear of that strain. Those can take anywhere from three to six weeks to heal and to recover from and most often require that the athlete stop the sport that they are participating in, whether it's running or basketball or working out.ou no longer can use that muscle. If you examine that muscle or that injury, you'll actually feel a gap where the muscle has torn away from the tendon initially, above or below the joint. Soon, thereafter, it will fill with blood.