There's no reason why people flying into the US from Africa can't be screened for elevated temperatures. In some countries when Avian flu was a risk, there were heat sensors which each passenger passed through to ensure they were not actively infected with Avian flu.
Ebola would be detected as fever is the first sign of the illness.
Other people with fevers would also be scrutinized, but the case here in TX could have likely been detected if we had body temperature screening for people coming from areas of active infection.
Yes, all US hospitals with up to date infection control measures should be able to safely care for a few Ebola- infected persons. I say " a few" because with something as deadly as Ebola, the nurses taking care of the Ebola- positive patient should not have any other assigned patients to prevent accidental cross- contamination, which does not occur in a " perfect world" but does occur in practice because humans aren't perfect.
Negative- pressure isolation is said to not be needed for Ebola treatment as it is not a respiratory- borne illness. Direct contact with secretions ( blood or other bodily fluids) is required for transmission according to the CDC conference here in TX today.