Rex V. Weston, 41, of Anchorage, has been charged with raping an 87 year old woman who is a resident at the Providence Extended Care Center.  The man approached the reception desk and asked to meet with someone at the home but the receptionist could not understand him and directed him to speak to someone else.  He wandered off and entered the room of the woman who was having dinner.  He then forced her into the chapel and raped her.  Her screams were heard by employees who ran in and stopped the attack and held the man until he escaped and fled on a bicycle before police arrived.  Police later arrested him.  Weston is listed on the state sex offender registry, he was convicted in 1983 of fourth-degree sexual abuse of a minor.  He is being held on $75,000 bond at the Cook Inlet Pretrial Facility.