I found a good article about the F-102 that Bush flew, his unit, and how the plane was used in Vietnam.

As the 1960s continued, many of these aircraft were transferred from the US Air Force to Air National Guard (ANG) units. By 1966, nearly 350 F-102s were being operated by ANG squadrons. A total of 23 ANG units across the US ultimately received the fighter, including squadrons in Arizona, California, Connecticut, Florida, Hawaii, Idaho, Louisiana, Maine, Minnesota, Montana, New York, North Dakota, Oregon, Pennsylvania, South Carolina, South Dakota, Tennessee, Texas, Vermont, Washington, and Wisconsin.

One of the primary ANG units to receive the F-102 was the 111th Fighter Interceptor Squadron (FIS) at Ellington Air National Guard Station, which operated the aircraft from 1965 through 1974. These planes were given responsibility for patrolling the Gulf Coast and intercepting Soviet Tu-95 bombers that regularly flew off the US shore while carrying a payload of nuclear weapons. The 111th was and still is part of the 147th Fighter Wing in Houston, Texas. It was here that George W. Bush was stationed following his enlistment in May 1968.

It is a common misconception that the Air National Guard was a safe place for military duty during the Vietnam War. In actuality, pilots from the 147th Fighter Interceptor Group, as it was called at the time, were actually conducting combat missions in Vietnam at the very time Bush enlisted. In fact, F-102 squadrons had been stationed in South Vietnam since March 1962. It was during this time that the Kennedy administration began building up a large US military presence in the nation as a deterrent against North Vietnamese invasion.

F-102 squadrons continued to be stationed in South Vietnam and Thailand throughout most of the Vietnam War. The planes were typically used for fighter defense patrols and as escorts for B-52 bomber raids. While the F-102 had few opportunities to engage in its primary role of fighter combat, the aircraft was used in the close air support role starting in 1965. Armed with rocket pods, Delta Daggers would make attacks on Viet Cong encampments in an attempt to harass enemy soldiers. Some missions were even conducted using the aircraft's heat-seeking air-to-air missiles to lock onto enemy campfires at night. Though these missions were never considered to be serious attacks on enemy activity, F-102 pilots did often report secondary explosions coming from their targets.

And there's also this:

Even in peacetime conditions, F-102 pilots risked their lives on every flight. Only highly-qualified pilot candidates were accepted for Delta Dagger training because it was such a challenging aircraft to fly and left little room for mistakes. According to the Air Force Safety Center , the lifetime Class A accident rate for the F-102 was 13.69 mishaps per 100,000 flight hours, much higher than the average for today's combat aircraft. For example, the F-16 has an accident rate of 4.14, the S-3 is at 2.6, the F-15 at 2.47, the F-18 at 4.9, and the F-117 at 4.07. Even the AV-8B, regarded as the most dangerous aircraft in service today, has an accident rate of only 11.05 mishaps per 100,000 flight hours. The F-102 claimed the lives of many pilots, including a number stationed at Ellington during Bush's tenure. Of the 875 F-102A production models that entered service, 259 were lost in accidents that killed 70 Air Force and ANG pilots.

The article includes discussion of Bush's military experience and includes links to Boston Globe and NYT articles from 2000 about the supposed 1 year gap in Bush's attendance records. That gap was addressed earlier this year.

None of this should matter for either candidate except for the fact that the DNC Chairman has called Bush for being AWOL and Kerry has raised his Vietnam experience as qualification for the presidency. The fact that he seldom discusses his 19 year Senate career seems to back up the notion that he didn't accomplish much there. For example of the 48 Senate Intelligence Committee meetings that were held during his 8 year tenure, he only attended 11 of them. I'm far more interested in his 19 year Senate record than what he did or didn't do during a 4 month tour in Vietnam some 35 years ago.