Is the guard excused if he prays at his place of work?

Question:
He says: Honorable Shaykh, may Allah grant you success. Two men guard the entrance to a government department. When the time for prayer comes, does one of them go to pray with the congregation in the department's prayer hall, knowing that if one of them goes, the other is forced to pray alone? Do they pray as a congregation, or what should they do?

Answer:
Yes, one goes and one stays. The one who misses the congregation is excused. It is guarding, and the one who goes has a reward, if Allah wills, because he did not leave the congregation except for an excuse. Yes.